diff --git a/builtin/providers/google/resource_compute_backend_service.go b/builtin/providers/google/resource_compute_backend_service.go
index 08eb432f0..e860a2254 100644
--- a/builtin/providers/google/resource_compute_backend_service.go
+++ b/builtin/providers/google/resource_compute_backend_service.go
@@ -128,6 +128,12 @@ func resourceComputeBackendService() *schema.Resource {
 				Computed: true,
 			},
 
+			"session_affinity": &schema.Schema{
+				Type:     schema.TypeString,
+				Optional: true,
+				Computed: true,
+			},
+
 			"timeout_sec": &schema.Schema{
 				Type:     schema.TypeInt,
 				Optional: true,
@@ -167,6 +173,10 @@ func resourceComputeBackendServiceCreate(d *schema.ResourceData, meta interface{
 		service.Protocol = v.(string)
 	}
 
+	if v, ok := d.GetOk("session_affinity"); ok {
+		service.SessionAffinity = v.(string)
+	}
+
 	if v, ok := d.GetOk("timeout_sec"); ok {
 		service.TimeoutSec = int64(v.(int))
 	}
@@ -225,6 +235,7 @@ func resourceComputeBackendServiceRead(d *schema.ResourceData, meta interface{})
 	d.Set("enable_cdn", service.EnableCDN)
 	d.Set("port_name", service.PortName)
 	d.Set("protocol", service.Protocol)
+	d.Set("session_affinity", service.SessionAffinity)
 	d.Set("timeout_sec", service.TimeoutSec)
 	d.Set("fingerprint", service.Fingerprint)
 	d.Set("self_link", service.SelfLink)
@@ -272,6 +283,10 @@ func resourceComputeBackendServiceUpdate(d *schema.ResourceData, meta interface{
 		service.TimeoutSec = int64(v.(int))
 	}
 
+	if d.HasChange("session_affinity") {
+		service.SessionAffinity = d.Get("session_affinity").(string)
+	}
+
 	if d.HasChange("enable_cdn") {
 		service.EnableCDN = d.Get("enable_cdn").(bool)
 	}
diff --git a/builtin/providers/google/resource_compute_backend_service_test.go b/builtin/providers/google/resource_compute_backend_service_test.go
index 74187485d..133b91d83 100644
--- a/builtin/providers/google/resource_compute_backend_service_test.go
+++ b/builtin/providers/google/resource_compute_backend_service_test.go
@@ -187,6 +187,40 @@ func TestAccComputeBackendService_withCDNEnabled(t *testing.T) {
 	}
 }
 
+func TestAccComputeBackendService_withSessionAffinity(t *testing.T) {
+	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{
+			resource.TestStep{
+				Config: testAccComputeBackendService_withSessionAffinity(
+					serviceName, checkName, "CLIENT_IP"),
+				Check: resource.ComposeTestCheckFunc(
+					testAccCheckComputeBackendServiceExists(
+						"google_compute_backend_service.foobar", &svc),
+				),
+			},
+			resource.TestStep{
+				Config: testAccComputeBackendService_withSessionAffinity(
+					serviceName, checkName, "GENERATED_COOKIE"),
+				Check: resource.ComposeTestCheckFunc(
+					testAccCheckComputeBackendServiceExists(
+						"google_compute_backend_service.foobar", &svc),
+				),
+			},
+		},
+	})
+
+	if svc.SessionAffinity != "GENERATED_COOKIE" {
+		t.Errorf("Expected SessionAffinity == \"GENERATED_COOKIE\", got %t", svc.SessionAffinity)
+	}
+}
+
 func testAccComputeBackendService_basic(serviceName, checkName string) string {
 	return fmt.Sprintf(`
 resource "google_compute_backend_service" "foobar" {
@@ -291,3 +325,20 @@ resource "google_compute_http_health_check" "default" {
 }
 `, serviceName, timeout, igName, itName, checkName)
 }
+
+func testAccComputeBackendService_withSessionAffinity(serviceName, checkName, affinityName string) string {
+	return fmt.Sprintf(`
+resource "google_compute_backend_service" "foobar" {
+  name             = "%s"
+  health_checks    = ["${google_compute_http_health_check.zero.self_link}"]
+  session_affinity = "%s"
+}
+
+resource "google_compute_http_health_check" "zero" {
+  name               = "%s"
+  request_path       = "/"
+  check_interval_sec = 1
+  timeout_sec        = 1
+}
+`, serviceName, affinityName, checkName)
+}
diff --git a/website/source/docs/providers/google/r/compute_backend_service.html.markdown b/website/source/docs/providers/google/r/compute_backend_service.html.markdown
index 71a2acb43..5ce2bbde7 100644
--- a/website/source/docs/providers/google/r/compute_backend_service.html.markdown
+++ b/website/source/docs/providers/google/r/compute_backend_service.html.markdown
@@ -89,6 +89,10 @@ The following arguments are supported:
 * `region` - (Optional) The Region in which the created address should reside.
     If it is not provided, the provider region is used.
 
+* `session_affinity` - (Optional) How to distribute load. Options are "NONE" (no
+    affinity), "CLIENT\_IP" (hash of the source/dest addresses / ports), and
+    "GENERATED\_COOKIE" (distribute load using a generated session cookie).
+
 * `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`.