diff --git a/google/resource_compute_backend_service.go b/google/resource_compute_backend_service.go
index 726433ae..38a34ae9 100644
--- a/google/resource_compute_backend_service.go
+++ b/google/resource_compute_backend_service.go
@@ -225,6 +225,11 @@ func resourceComputeBackendService() *schema.Resource {
 				Computed: true,
 			},
 
+			"affinity_cookie_ttl_sec": {
+				Type:     schema.TypeInt,
+				Optional: true,
+			},
+
 			"timeout_sec": {
 				Type:     schema.TypeInt,
 				Optional: true,
@@ -310,6 +315,7 @@ func resourceComputeBackendServiceRead(d *schema.ResourceData, meta interface{})
 	d.Set("port_name", service.PortName)
 	d.Set("protocol", service.Protocol)
 	d.Set("session_affinity", service.SessionAffinity)
+	d.Set("affinity_cookie_ttl_sec", service.AffinityCookieTtlSec)
 	d.Set("timeout_sec", service.TimeoutSec)
 	d.Set("fingerprint", service.Fingerprint)
 	d.Set("self_link", ConvertSelfLinkToV1(service.SelfLink))
@@ -562,6 +568,10 @@ func expandBackendService(d *schema.ResourceData) (*computeBeta.BackendService,
 		service.SessionAffinity = v.(string)
 	}
 
+	if v, ok := d.GetOk("affinity_cookie_ttl_sec"); ok {
+		service.AffinityCookieTtlSec = int64(v.(int))
+	}
+
 	if v, ok := d.GetOk("timeout_sec"); ok {
 		service.TimeoutSec = int64(v.(int))
 	}
diff --git a/google/resource_compute_backend_service_test.go b/google/resource_compute_backend_service_test.go
index cdecc13a..c003aa63 100644
--- a/google/resource_compute_backend_service_test.go
+++ b/google/resource_compute_backend_service_test.go
@@ -502,6 +502,38 @@ func TestAccComputeBackendService_withSessionAffinity(t *testing.T) {
 	}
 }
 
+func TestAccComputeBackendService_withAffinityCookieTtlSec(t *testing.T) {
+	t.Parallel()
+
+	serviceName := fmt.Sprintf("tf-test-%s", acctest.RandString(10))
+	checkName := fmt.Sprintf("tf-test-%s", acctest.RandString(10))
+	var svc compute.BackendService
+
+	resource.Test(t, resource.TestCase{
+		PreCheck:     func() { testAccPreCheck(t) },
+		Providers:    testAccProviders,
+		CheckDestroy: testAccCheckComputeBackendServiceDestroy,
+		Steps: []resource.TestStep{
+			{
+				Config: testAccComputeBackendService_withAffinityCookieTtlSec(
+					serviceName, checkName, "description", "GENERATED_COOKIE", 300),
+				Check: resource.ComposeTestCheckFunc(
+					testAccCheckComputeBackendServiceExists(
+						"google_compute_backend_service.foobar", &svc),
+				),
+			},
+		},
+	})
+
+	if svc.SessionAffinity != "GENERATED_COOKIE" {
+		t.Errorf("Expected SessionAffinity == \"GENERATED_COOKIE\", got %s", svc.SessionAffinity)
+	}
+
+	if svc.AffinityCookieTtlSec != 300 {
+		t.Errorf("Expected AffinityCookieTtlSec == 300, got %v", svc.AffinityCookieTtlSec)
+	}
+}
+
 func TestAccComputeBackendService_withMaxConnections(t *testing.T) {
 	t.Parallel()
 
@@ -775,6 +807,24 @@ resource "google_compute_http_health_check" "zero" {
 `, serviceName, description, affinityName, checkName)
 }
 
+func testAccComputeBackendService_withAffinityCookieTtlSec(serviceName, checkName, description, affinityName string, affinityCookieTtlSec int64) string {
+	return fmt.Sprintf(`
+resource "google_compute_backend_service" "foobar" {
+  name                    = "%s"
+  description             = "%s"
+  health_checks           = ["${google_compute_http_health_check.zero.self_link}"]
+  session_affinity        = "%s"
+  affinity_cookie_ttl_sec = %v
+}
+ resource "google_compute_http_health_check" "zero" {
+  name               = "%s"
+  request_path       = "/"
+  check_interval_sec = 1
+  timeout_sec        = 1
+}
+`, serviceName, description, affinityName, affinityCookieTtlSec, checkName)
+}
+
 func testAccComputeBackendService_withConnectionDraining(serviceName, checkName string, drainingTimeout int64) string {
 	return fmt.Sprintf(`
 resource "google_compute_backend_service" "foobar" {
diff --git a/website/docs/r/compute_backend_service.html.markdown b/website/docs/r/compute_backend_service.html.markdown
index b2c6599a..0d717176 100644
--- a/website/docs/r/compute_backend_service.html.markdown
+++ b/website/docs/r/compute_backend_service.html.markdown
@@ -107,6 +107,10 @@ but still work to finish started ones). Defaults to `300`.
     affinity), `CLIENT_IP` (hash of the source/dest addresses / ports), and
     `GENERATED_COOKIE` (distribute load using a generated session cookie).
 
+* `affinity_cookie_ttl_sec` - (Optional) Lifetime of cookies in seconds if session_affinity is
+    `GENERATED_COOKIE`. If set to 0, the cookie is non-persistent and lasts only until the end of
+    the browser session (or equivalent). The maximum allowed value for TTL is one day.
+
 * `timeout_sec` - (Optional) The number of secs to wait for a backend to respond
     to a request before considering the request failed. Defaults to `30`.