diff --git a/.changelog/12607.txt b/.changelog/12607.txt
new file mode 100644
index 00000000000..07409549cf5
--- /dev/null
+++ b/.changelog/12607.txt
@@ -0,0 +1,3 @@
+```release-note:note
+workbench: Changed `container_Image` field of `google_workbench_instance` resource to modifiable.
+```
\ No newline at end of file
diff --git a/google/services/workbench/resource_workbench_instance.go b/google/services/workbench/resource_workbench_instance.go
index 150e55d22cb..9b70f4f40fb 100644
--- a/google/services/workbench/resource_workbench_instance.go
+++ b/google/services/workbench/resource_workbench_instance.go
@@ -1118,6 +1118,10 @@ func resourceWorkbenchInstanceUpdate(d *schema.ResourceData, meta interface{}) e
 	if d.HasChange("effective_labels") {
 		newUpdateMask = append(newUpdateMask, "labels")
 	}
+	if d.HasChange("gce_setup.0.container_image") {
+		newUpdateMask = append(newUpdateMask, "gce_setup.container_image")
+		stopInstance = true
+	}
 	updateMask = newUpdateMask
 	// Overwrite the previously set mask.
 	url, err = transport_tpg.AddQueryParams(url, map[string]string{"updateMask": strings.Join(newUpdateMask, ",")})
diff --git a/google/services/workbench/resource_workbench_instance_test.go b/google/services/workbench/resource_workbench_instance_test.go
index ba39529ad53..082921220e5 100644
--- a/google/services/workbench/resource_workbench_instance_test.go
+++ b/google/services/workbench/resource_workbench_instance_test.go
@@ -692,3 +692,74 @@ resource "google_workbench_instance" "instance" {
 }
 `, context)
 }
+
+func TestAccWorkbenchInstance_updateCustomContainers(t *testing.T) {
+	t.Parallel()
+
+	context := map[string]interface{}{
+		"random_suffix": acctest.RandString(t, 10),
+	}
+
+	acctest.VcrTest(t, resource.TestCase{
+		PreCheck:                 func() { acctest.AccTestPreCheck(t) },
+		ProtoV5ProviderFactories: acctest.ProtoV5ProviderFactories(t),
+		Steps: []resource.TestStep{
+			{
+				Config: testAccWorkbenchInstance_customcontainer(context),
+				Check: resource.ComposeTestCheckFunc(
+					resource.TestCheckResourceAttr(
+						"google_workbench_instance.instance", "state", "ACTIVE"),
+				),
+			},
+			{
+				ResourceName:            "google_workbench_instance.instance",
+				ImportState:             true,
+				ImportStateVerify:       true,
+				ImportStateVerifyIgnore: []string{"name", "instance_owners", "location", "instance_id", "request_id", "labels", "terraform_labels", "desired_state"},
+			},
+			{
+				Config: testAccWorkbenchInstance_updatedcustomcontainer(context),
+				Check: resource.ComposeTestCheckFunc(
+					resource.TestCheckResourceAttr(
+						"google_workbench_instance.instance", "state", "ACTIVE"),
+				),
+			},
+			{
+				ResourceName:            "google_workbench_instance.instance",
+				ImportState:             true,
+				ImportStateVerify:       true,
+				ImportStateVerifyIgnore: []string{"name", "instance_owners", "location", "instance_id", "request_id", "labels", "terraform_labels", "desired_state"},
+			},
+		},
+	})
+}
+
+func testAccWorkbenchInstance_customcontainer(context map[string]interface{}) string {
+	return acctest.Nprintf(`
+resource "google_workbench_instance" "instance" {
+  name = "tf-test-workbench-instance%{random_suffix}"
+  location = "us-central1-a"
+  gce_setup {
+    container_image {
+      repository = "us-docker.pkg.dev/deeplearning-platform-release/gcr.io/base-cu113.py310"
+      tag = "latest"
+    }
+  }
+}
+`, context)
+}
+
+func testAccWorkbenchInstance_updatedcustomcontainer(context map[string]interface{}) string {
+	return acctest.Nprintf(`
+resource "google_workbench_instance" "instance" {
+  name = "tf-test-workbench-instance%{random_suffix}"
+  location = "us-central1-a"
+  gce_setup {
+    container_image {
+      repository = "gcr.io/deeplearning-platform-release/workbench-container"
+      tag = "20241117-2200-rc0"
+    }
+  }
+}
+`, context)
+}