diff --git a/packages-content-model/roosterjs-content-model-core/lib/corePlugin/EntityPlugin.ts b/packages-content-model/roosterjs-content-model-core/lib/corePlugin/EntityPlugin.ts
index 2dc12f09383..0ad7d0e4109 100644
--- a/packages-content-model/roosterjs-content-model-core/lib/corePlugin/EntityPlugin.ts
+++ b/packages-content-model/roosterjs-content-model-core/lib/corePlugin/EntityPlugin.ts
@@ -148,6 +148,10 @@ class EntityPlugin implements PluginWithState<EntityPluginState> {
                     entity.entityFormat.id = this.ensureUniqueId(entityType, id ?? '', wrapper);
                     wrapper.className = generateEntityClassNames(entity.entityFormat);
 
+                    if (entity.entityFormat.isReadonly) {
+                        wrapper.contentEditable = 'false';
+                    }
+
                     const eventResult = this.triggerEvent(editor, wrapper, operation, rawEvent);
 
                     this.state.entityMap[entity.entityFormat.id] = {
diff --git a/packages-content-model/roosterjs-content-model-core/test/corePlugin/EntityPluginTest.ts b/packages-content-model/roosterjs-content-model-core/test/corePlugin/EntityPluginTest.ts
index 9bdf710ffe1..f303a9a430e 100644
--- a/packages-content-model/roosterjs-content-model-core/test/corePlugin/EntityPluginTest.ts
+++ b/packages-content-model/roosterjs-content-model-core/test/corePlugin/EntityPluginTest.ts
@@ -83,7 +83,7 @@ describe('EntityPlugin', () => {
                 },
             });
             expect(wrapper.outerHTML).toBe(
-                '<div class="_Entity _EType_Entity1 _EId_Entity1 _EReadonly_1"></div>'
+                '<div class="_Entity _EType_Entity1 _EId_Entity1 _EReadonly_1" contenteditable="false"></div>'
             );
             expect(triggerPluginEventSpy).toHaveBeenCalledTimes(1);
             expect(triggerPluginEventSpy).toHaveBeenCalledWith(PluginEventType.EntityOperation, {
@@ -125,7 +125,7 @@ describe('EntityPlugin', () => {
                 },
             });
             expect(wrapper.outerHTML).toBe(
-                '<div class="_Entity _EType_Entity1 _EId_Entity1 _EReadonly_1"></div>'
+                '<div class="_Entity _EType_Entity1 _EId_Entity1 _EReadonly_1" contenteditable="false"></div>'
             );
             expect(triggerPluginEventSpy).toHaveBeenCalledTimes(1);
             expect(triggerPluginEventSpy).toHaveBeenCalledWith(PluginEventType.EntityOperation, {
@@ -166,7 +166,7 @@ describe('EntityPlugin', () => {
                 },
             });
             expect(wrapper.outerHTML).toBe(
-                '<div class="_Entity _EType_Entity1 _EId_Entity1 _EReadonly_1"></div>'
+                '<div class="_Entity _EType_Entity1 _EId_Entity1 _EReadonly_1" contenteditable="false"></div>'
             );
             expect(triggerPluginEventSpy).toHaveBeenCalledTimes(1);
             expect(triggerPluginEventSpy).toHaveBeenCalledWith(PluginEventType.EntityOperation, {
@@ -206,7 +206,7 @@ describe('EntityPlugin', () => {
                 },
             });
             expect(wrapper.outerHTML).toBe(
-                '<div class="_Entity _EType_Entity1 _EId_Entity1 _EReadonly_1"></div>'
+                '<div class="_Entity _EType_Entity1 _EId_Entity1 _EReadonly_1" contenteditable="false"></div>'
             );
             expect(triggerPluginEventSpy).toHaveBeenCalledTimes(1);
             expect(triggerPluginEventSpy).toHaveBeenCalledWith(PluginEventType.EntityOperation, {
@@ -260,7 +260,7 @@ describe('EntityPlugin', () => {
                 },
             });
             expect(wrapper.outerHTML).toBe(
-                '<div class="_Entity _EType_Entity1 _EId_Entity1 _EReadonly_1"></div>'
+                '<div class="_Entity _EType_Entity1 _EId_Entity1 _EReadonly_1" contenteditable="false"></div>'
             );
             expect(triggerPluginEventSpy).toHaveBeenCalledTimes(2);
             expect(triggerPluginEventSpy).toHaveBeenCalledWith(PluginEventType.EntityOperation, {
@@ -344,7 +344,7 @@ describe('EntityPlugin', () => {
                 },
             });
             expect(wrapper.outerHTML).toBe(
-                '<div class="_Entity _EType_Entity1 _EId_Entity1 _EReadonly_1"></div>'
+                '<div class="_Entity _EType_Entity1 _EId_Entity1 _EReadonly_1" contenteditable="false"></div>'
             );
             expect(triggerPluginEventSpy).toHaveBeenCalledTimes(1);
             expect(triggerPluginEventSpy).toHaveBeenCalledWith(PluginEventType.EntityOperation, {
@@ -408,7 +408,7 @@ describe('EntityPlugin', () => {
                 '<div class="_Entity _EType_E1 _EId_E1 _EReadonly_1"></div>'
             );
             expect(wrapper2.outerHTML).toBe(
-                '<div class="_Entity _EType_E2 _EId_E2 _EReadonly_1"></div>'
+                '<div class="_Entity _EType_E2 _EId_E2 _EReadonly_1" contenteditable="false"></div>'
             );
             expect(triggerPluginEventSpy).toHaveBeenCalledTimes(2);
             expect(triggerPluginEventSpy).toHaveBeenCalledWith(PluginEventType.EntityOperation, {
@@ -475,7 +475,7 @@ describe('EntityPlugin', () => {
                 '<div class="_Entity _EType_E1 _EId_E1 _EReadonly_1"></div>'
             );
             expect(wrapper2.outerHTML).toBe(
-                '<div class="_Entity _EType_E2 _EId_E1_1 _EReadonly_1"></div>'
+                '<div class="_Entity _EType_E2 _EId_E1_1 _EReadonly_1" contenteditable="false"></div>'
             );
             expect(triggerPluginEventSpy).toHaveBeenCalledTimes(1);
             expect(triggerPluginEventSpy).toHaveBeenCalledWith(PluginEventType.EntityOperation, {