diff --git a/packages/layout-engine/contracts/src/index.ts b/packages/layout-engine/contracts/src/index.ts
index e7a7d1b2f3..cb0b9661f9 100644
--- a/packages/layout-engine/contracts/src/index.ts
+++ b/packages/layout-engine/contracts/src/index.ts
@@ -1168,6 +1168,7 @@ export type ParagraphBorders = {
   bottom?: ParagraphBorder;
   left?: ParagraphBorder;
   between?: ParagraphBorder;
+  bar?: ParagraphBorder;
 };
 
 export type ParagraphShading = {
diff --git a/packages/layout-engine/painters/dom/src/features/paragraph-borders/border-layer.ts b/packages/layout-engine/painters/dom/src/features/paragraph-borders/border-layer.ts
index 67549b624a..8dea45783a 100644
--- a/packages/layout-engine/painters/dom/src/features/paragraph-borders/border-layer.ts
+++ b/packages/layout-engine/painters/dom/src/features/paragraph-borders/border-layer.ts
@@ -214,6 +214,11 @@ export const applyParagraphBorderStyles = (
   if (showBetweenBorder && borders.between) {
     setBorderSideStyle(element, 'bottom', borders.between);
   }
+
+  // Bar border: decorative vertical line on the left edge of the paragraph (OOXML §17.3.1.4)
+  if (borders.bar && borders.bar.style !== 'none') {
+    setBorderSideStyle(element, 'left', borders.bar);
+  }
 };
 
 const setBorderSideStyle = (element: HTMLElement, side: CssBorderSide, border: ParagraphBorder): void => {
diff --git a/packages/layout-engine/painters/dom/src/paragraph-hash-utils.ts b/packages/layout-engine/painters/dom/src/paragraph-hash-utils.ts
index 55870ed7e9..204d71cc34 100644
--- a/packages/layout-engine/painters/dom/src/paragraph-hash-utils.ts
+++ b/packages/layout-engine/painters/dom/src/paragraph-hash-utils.ts
@@ -30,6 +30,7 @@ export const hashParagraphBorders = (borders: ParagraphBorders): string => {
   if (borders.bottom) parts.push(`b:[${hashParagraphBorder(borders.bottom)}]`);
   if (borders.left) parts.push(`l:[${hashParagraphBorder(borders.left)}]`);
   if (borders.between) parts.push(`bw:[${hashParagraphBorder(borders.between)}]`);
+  if (borders.bar) parts.push(`bar:[${hashParagraphBorder(borders.bar)}]`);
   return parts.join(';');
 };
 
diff --git a/packages/layout-engine/pm-adapter/src/attributes/borders.ts b/packages/layout-engine/pm-adapter/src/attributes/borders.ts
index c1a78ba32f..7e0d85b128 100644
--- a/packages/layout-engine/pm-adapter/src/attributes/borders.ts
+++ b/packages/layout-engine/pm-adapter/src/attributes/borders.ts
@@ -324,7 +324,14 @@ export function extractCellPadding(cellAttrs: Record<string, unknown>): BoxSpaci
 export const normalizeParagraphBorders = (value: unknown): ParagraphAttrs['borders'] | undefined => {
   if (!value || typeof value !== 'object') return undefined;
   const source = value as Record<string, unknown>;
-  const sides: Array<'top' | 'right' | 'bottom' | 'left' | 'between'> = ['top', 'right', 'bottom', 'left', 'between'];
+  const sides: Array<'top' | 'right' | 'bottom' | 'left' | 'between' | 'bar'> = [
+    'top',
+    'right',
+    'bottom',
+    'left',
+    'between',
+    'bar',
+  ];
   const borders: ParagraphAttrs['borders'] = {};
 
   sides.forEach((side) => {