diff --git a/apps/web/src/components/builder/field-editor.tsx b/apps/web/src/components/builder/field-editor.tsx
index aed3c0f..50df77f 100644
--- a/apps/web/src/components/builder/field-editor.tsx
+++ b/apps/web/src/components/builder/field-editor.tsx
@@ -6,6 +6,7 @@ import { Card, Checkbox, Field, Input } from "@msk-forms/ui";
 import {
   isLayoutType,
   needsOptions,
+  needsRows,
   needsSliderConfig,
   needsStarsConfig,
 } from "@/lib/builder-fields";
@@ -58,6 +59,18 @@ export function FieldEditor({
   /** Parse a numeric config input, treating an empty string as "unset". */
   const num = (s: string): number | undefined => (s === "" ? undefined : Number(s));
 
+  function setRow(i: number, label: string) {
+    const rows = [...(field.rows ?? [])];
+    rows[i] = { id: rows[i]?.id ?? crypto.randomUUID(), label };
+    patch({ rows });
+  }
+  function addRow() {
+    patch({ rows: [...(field.rows ?? []), { id: crypto.randomUUID(), label: "" }] });
+  }
+  function removeRow(i: number) {
+    patch({ rows: (field.rows ?? []).filter((_, j) => j !== i) });
+  }
+
   return (
     <Card className="flex flex-col gap-3 p-4">
       <div className="flex items-center justify-between">
@@ -97,7 +110,7 @@ export function FieldEditor({
           </Field>
 
           {needsOptions(field.type) && (
-            <Field label={t.options}>
+            <Field label={needsRows(field.type) ? t.columns : t.options}>
               <div className="flex flex-col gap-2">
                 {(field.options ?? []).map((opt, i) => (
                   <div key={i} className="flex gap-2">
@@ -122,6 +135,32 @@ export function FieldEditor({
             </Field>
           )}
 
+          {needsRows(field.type) && (
+            <Field label={t.rows}>
+              <div className="flex flex-col gap-2">
+                {(field.rows ?? []).map((row, i) => (
+                  <div key={row.id} className="flex gap-2">
+                    <Input
+                      value={row.label}
+                      onChange={(e) => setRow(i, e.target.value)}
+                      placeholder={`${t.rowPh} ${i + 1}`}
+                    />
+                    <IconButton label={t.removeRow} onClick={() => removeRow(i)}>
+                      ✕
+                    </IconButton>
+                  </div>
+                ))}
+                <button
+                  type="button"
+                  onClick={addRow}
+                  className="self-start text-sm font-medium text-primary hover:underline"
+                >
+                  + {t.addRow}
+                </button>
+              </div>
+            </Field>
+          )}
+
           {needsStarsConfig(field.type) && (
             <Field label={t.stars}>
               <Input
diff --git a/apps/web/src/components/form/field-input.tsx b/apps/web/src/components/form/field-input.tsx
index 3efb8b5..36356b1 100644
--- a/apps/web/src/components/form/field-input.tsx
+++ b/apps/web/src/components/form/field-input.tsx
@@ -11,9 +11,17 @@ import {
 } from "@msk-forms/ui";
 
 import { FileField, type FileFieldLabels } from "./file-field";
+import { MatrixField } from "./matrix-field";
 import { ScaleButtons, SliderInput, StarRating } from "./rating-fields";
 
-export type FieldValue = string | number | boolean | string[] | FileAnswer | undefined;
+export type FieldValue =
+  | string
+  | number
+  | boolean
+  | string[]
+  | FileAnswer
+  | Record<string, string>
+  | undefined;
 
 const YES_NO_OPTIONS = [
   { value: "yes", label: "Yes" },
@@ -131,6 +139,16 @@ export function FieldInput({
       );
     }
 
+    case "matrix":
+      return (
+        <MatrixField
+          field={field}
+          value={value as Record<string, string> | undefined}
+          disabled={disabled}
+          onChange={onChange}
+        />
+      );
+
     case "single_choice":
       return (
         <RadioGroup
diff --git a/apps/web/src/components/form/form-renderer.tsx b/apps/web/src/components/form/form-renderer.tsx
index 0b9326c..c2bf6b8 100644
--- a/apps/web/src/components/form/form-renderer.tsx
+++ b/apps/web/src/components/form/form-renderer.tsx
@@ -21,6 +21,8 @@ function isEmpty(value: FieldValue): boolean {
   if (value === undefined || value === null || value === "") return true;
   if (Array.isArray(value)) return value.length === 0;
   if (value === false) return true; // unchecked consent/age_check
+  // Matrix answer ({ rowId: column }) with nothing picked yet.
+  if (typeof value === "object" && Object.keys(value).length === 0) return true;
   return false;
 }
 
diff --git a/apps/web/src/components/form/matrix-field.tsx b/apps/web/src/components/form/matrix-field.tsx
new file mode 100644
index 0000000..2f3f5d5
--- /dev/null
+++ b/apps/web/src/components/form/matrix-field.tsx
@@ -0,0 +1,73 @@
+"use client";
+
+import type { FormField } from "@msk-forms/shared";
+
+type MatrixValue = Record<string, string>;
+
+/**
+ * Matrix question: one radio per (row, column). Rows are the field's sub-questions,
+ * columns reuse the field's `options`. The answer is a `{ rowId: columnValue }` map.
+ */
+export function MatrixField({
+  field,
+  value,
+  onChange,
+  disabled,
+}: {
+  field: FormField;
+  value?: MatrixValue;
+  onChange: (value: MatrixValue) => void;
+  disabled?: boolean;
+}) {
+  const rows = field.rows ?? [];
+  const cols = field.options ?? [];
+  const current = value ?? {};
+
+  function pick(rowId: string, colValue: string) {
+    onChange({ ...current, [rowId]: colValue });
+  }
+
+  return (
+    <div className="overflow-x-auto">
+      <table className="w-full border-collapse text-sm">
+        <thead>
+          <tr>
+            <th className="p-2" />
+            {cols.map((col) => (
+              <th
+                key={col.value}
+                className="p-2 text-center text-xs font-medium text-muted-foreground"
+              >
+                {col.label}
+              </th>
+            ))}
+          </tr>
+        </thead>
+        <tbody>
+          {rows.map((row) => (
+            <tr key={row.id} className="border-t border-border">
+              <td className="p-2 text-foreground">{row.label}</td>
+              {cols.map((col) => {
+                const name = `${field.id}-${row.id}`;
+                return (
+                  <td key={col.value} className="p-2 text-center">
+                    <input
+                      type="radio"
+                      name={name}
+                      aria-label={`${row.label}: ${col.label}`}
+                      value={col.value}
+                      checked={current[row.id] === col.value}
+                      disabled={disabled}
+                      onChange={() => pick(row.id, col.value)}
+                      className="h-4 w-4 accent-primary"
+                    />
+                  </td>
+                );
+              })}
+            </tr>
+          ))}
+        </tbody>
+      </table>
+    </div>
+  );
+}
diff --git a/apps/web/src/i18n/dictionaries.ts b/apps/web/src/i18n/dictionaries.ts
index d96981d..f59ed85 100644
--- a/apps/web/src/i18n/dictionaries.ts
+++ b/apps/web/src/i18n/dictionaries.ts
@@ -134,10 +134,11 @@ const en = {
     moveUp: "Move up", moveDown: "Move down", remove: "Remove", removeOption: "Remove option",
     labelPh: "Question label…", headingPh: "Section heading…",
     stars: "Stars", min: "Min", max: "Max", step: "Step",
+    columns: "Columns", rows: "Rows", rowPh: "Row", addRow: "Add row", removeRow: "Remove row",
     ft: {
       short_text: "Short text", long_text: "Long text", email: "Email", number: "Number", phone: "Phone", url: "URL",
       single_choice: "Single choice", dropdown: "Dropdown", multi_choice: "Multiple choice", yes_no: "Yes / No",
-      rating_stars: "Star rating", nps: "NPS (0–10)", slider: "Slider", emoji_scale: "Emoji scale",
+      rating_stars: "Star rating", nps: "NPS (0–10)", slider: "Slider", emoji_scale: "Emoji scale", matrix: "Matrix",
       date: "Date", file_upload: "File upload", image_upload: "Image upload",
       consent: "Consent", heading: "Heading", paragraph: "Paragraph", divider: "Divider",
     },
@@ -288,10 +289,11 @@ const de: Dictionary = {
     moveUp: "Nach oben", moveDown: "Nach unten", remove: "Entfernen", removeOption: "Option entfernen",
     labelPh: "Fragetext…", headingPh: "Abschnittsüberschrift…",
     stars: "Sterne", min: "Min", max: "Max", step: "Schritt",
+    columns: "Spalten", rows: "Zeilen", rowPh: "Zeile", addRow: "Zeile hinzufügen", removeRow: "Zeile entfernen",
     ft: {
       short_text: "Kurztext", long_text: "Langtext", email: "E-Mail", number: "Zahl", phone: "Telefon", url: "URL",
       single_choice: "Einfachauswahl", dropdown: "Dropdown", multi_choice: "Mehrfachauswahl", yes_no: "Ja / Nein",
-      rating_stars: "Sterne-Bewertung", nps: "NPS (0–10)", slider: "Schieberegler", emoji_scale: "Emoji-Skala",
+      rating_stars: "Sterne-Bewertung", nps: "NPS (0–10)", slider: "Schieberegler", emoji_scale: "Emoji-Skala", matrix: "Matrix",
       date: "Datum", file_upload: "Datei-Upload", image_upload: "Bild-Upload",
       consent: "Zustimmung", heading: "Überschrift", paragraph: "Absatz", divider: "Trenner",
     },
diff --git a/apps/web/src/lib/builder-fields.ts b/apps/web/src/lib/builder-fields.ts
index 715826e..f21f78f 100644
--- a/apps/web/src/lib/builder-fields.ts
+++ b/apps/web/src/lib/builder-fields.ts
@@ -16,6 +16,7 @@ export const BUILDER_FIELDS: { type: FieldType; label: string }[] = [
   { type: "nps", label: "NPS (0–10)" },
   { type: "slider", label: "Slider" },
   { type: "emoji_scale", label: "Emoji scale" },
+  { type: "matrix", label: "Matrix" },
   { type: "date", label: "Date" },
   { type: "file_upload", label: "File upload" },
   { type: "image_upload", label: "Image upload" },
@@ -25,7 +26,9 @@ export const BUILDER_FIELDS: { type: FieldType; label: string }[] = [
   { type: "divider", label: "Divider" },
 ];
 
-const CHOICE_TYPES: FieldType[] = ["single_choice", "dropdown", "multi_choice"];
+// `matrix` also needs an option editor — its options are the shared columns.
+const CHOICE_TYPES: FieldType[] = ["single_choice", "dropdown", "multi_choice", "matrix"];
+const ROWS_CONFIG_TYPES: FieldType[] = ["matrix"];
 // Distinct from shared LAYOUT_FIELD_TYPES: only the layout types the builder
 // currently offers (not every layout type the renderer can display).
 const BUILDER_LAYOUT_TYPES: FieldType[] = ["heading", "paragraph", "divider"];
@@ -42,3 +45,4 @@ export const needsOptions = (type: FieldType): boolean => CHOICE_TYPES.includes(
 export const isLayoutType = (type: FieldType): boolean => BUILDER_LAYOUT_TYPES.includes(type);
 export const needsStarsConfig = (type: FieldType): boolean => STARS_CONFIG_TYPES.includes(type);
 export const needsSliderConfig = (type: FieldType): boolean => SLIDER_CONFIG_TYPES.includes(type);
+export const needsRows = (type: FieldType): boolean => ROWS_CONFIG_TYPES.includes(type);
diff --git a/packages/shared/src/form-spec.test.ts b/packages/shared/src/form-spec.test.ts
index 21bb447..bb3e3a0 100644
--- a/packages/shared/src/form-spec.test.ts
+++ b/packages/shared/src/form-spec.test.ts
@@ -171,6 +171,32 @@ describe("buildAnswerSchema", () => {
     expect(s.safeParse({ s: 100 }).success).toBe(true);
     expect(s.safeParse({ s: 101 }).success).toBe(false);
   });
+
+  const matrixField = {
+    id: "m",
+    type: "matrix" as const,
+    options: [
+      { value: "y", label: "Yes" },
+      { value: "n", label: "No" },
+    ],
+    rows: [
+      { id: "r1", label: "Q1" },
+      { id: "r2", label: "Q2" },
+    ],
+  };
+
+  it("validates a required matrix against its rows and columns", () => {
+    const s = buildAnswerSchema(specWith({ ...matrixField, validation: { required: true } }));
+    expect(s.safeParse({ m: { r1: "y", r2: "n" } }).success).toBe(true);
+    expect(s.safeParse({ m: { r1: "y" } }).success).toBe(false); // r2 missing
+    expect(s.safeParse({ m: { r1: "x", r2: "n" } }).success).toBe(false); // bad column
+  });
+
+  it("allows a partial/empty matrix when optional", () => {
+    const s = buildAnswerSchema(specWith({ ...matrixField, validation: { required: false } }));
+    expect(s.safeParse({}).success).toBe(true);
+    expect(s.safeParse({ m: { r1: "y" } }).success).toBe(true);
+  });
 });
 
 describe("formatAnswerValue (rating family)", () => {
@@ -183,4 +209,24 @@ describe("formatAnswerValue (rating family)", () => {
     expect(formatAnswerValue(stars, 4, L)).toBe("★ 4");
     expect(formatAnswerValue(emoji, 5, L)).toContain("5/5");
   });
+
+  it("renders a matrix answer as row: column pairs", () => {
+    const matrix: FormField = {
+      id: "m",
+      type: "matrix",
+      width: "full",
+      validation: { required: false },
+      conditional: [],
+      options: [
+        { value: "y", label: "Yes" },
+        { value: "n", label: "No" },
+      ],
+      rows: [
+        { id: "r1", label: "Q1" },
+        { id: "r2", label: "Q2" },
+      ],
+    };
+    expect(formatAnswerValue(matrix, { r1: "y", r2: "n" }, L)).toBe("Q1: Yes; Q2: No");
+    expect(formatAnswerValue(matrix, {}, L)).toBe("—");
+  });
 });
diff --git a/packages/shared/src/form-spec.ts b/packages/shared/src/form-spec.ts
index 3042b7d..f403667 100644
--- a/packages/shared/src/form-spec.ts
+++ b/packages/shared/src/form-spec.ts
@@ -99,6 +99,13 @@ export const fieldOptionSchema = z.object({
   score: z.number().optional(),
 });
 
+/** A matrix row (sub-question). Columns reuse the field's `options`. */
+export const matrixRowSchema = z.object({
+  id: z.string(),
+  label: z.string(),
+});
+export type MatrixRow = z.infer<typeof matrixRowSchema>;
+
 export const formFieldSchema = z.object({
   id: z.string(),
   type: fieldTypeSchema,
@@ -108,6 +115,8 @@ export const formFieldSchema = z.object({
   width: z.enum(["full", "half", "third"]).default("full"),
   defaultValue: z.unknown().optional(),
   options: z.array(fieldOptionSchema).optional(),
+  // Matrix sub-questions (rows); the shared column choices live in `options`.
+  rows: z.array(matrixRowSchema).optional(),
   validation: fieldValidationSchema.default({ required: false }),
   conditional: z.array(conditionRuleSchema).default([]),
   translations: z.record(z.string(), z.record(z.string(), z.string())).optional(),
@@ -214,6 +223,15 @@ export function formatAnswerValue(
 
   const labelFor = (v: string) => field.options?.find((o) => o.value === v)?.label ?? v;
 
+  // Matrix answer: { rowId: columnValue } → "Row: Column; Row: Column".
+  if (field.type === "matrix" && typeof value === "object" && !Array.isArray(value)) {
+    const answers = value as Record<string, unknown>;
+    const lines = (field.rows ?? [])
+      .filter((row) => answers[row.id] != null && answers[row.id] !== "")
+      .map((row) => `${row.label}: ${labelFor(String(answers[row.id]))}`);
+    return lines.length > 0 ? lines.join("; ") : labels.empty;
+  }
+
   if (Array.isArray(value)) return value.map((v) => labelFor(String(v))).join(", ");
   // File-descriptor answer ({ key, name, size, mime }) — show the filename.
   if (typeof value === "object" && "name" in value) {
@@ -278,6 +296,14 @@ function buildFieldSchema(field: FormField): z.ZodTypeAny {
         : arr;
   } else if (BOOLEAN_TYPES.includes(field.type)) {
     base = z.boolean();
+  } else if (field.type === "matrix") {
+    // Answer is { rowId: columnValue }; each row picks one of the columns.
+    const col = optionValues.length > 0 ? z.enum(optionValues as [string, ...string[]]) : z.string();
+    const shape: Record<string, z.ZodTypeAny> = {};
+    for (const row of field.rows ?? []) {
+      shape[row.id] = v.required ? col : col.optional();
+    }
+    base = z.object(shape);
   } else if ((FILE_FIELD_TYPES as readonly string[]).includes(field.type)) {
     base = fileAnswerSchema;
   } else if (SINGLE_CHOICE_TYPES.includes(field.type)) {