diff --git a/storage/google/cloud/storage/blob.py b/storage/google/cloud/storage/blob.py
index cf22a9a77ae2..1b718520865d 100644
--- a/storage/google/cloud/storage/blob.py
+++ b/storage/google/cloud/storage/blob.py
@@ -59,11 +59,12 @@
 from google.cloud.storage._signing import generate_signed_url_v4
 from google.cloud.storage.acl import ACL
 from google.cloud.storage.acl import ObjectACL
-from google.cloud.storage.constants import STANDARD_STORAGE_CLASS
-from google.cloud.storage.constants import NEARLINE_STORAGE_CLASS
+from google.cloud.storage.constants import ARCHIVE_STORAGE_CLASS
 from google.cloud.storage.constants import COLDLINE_STORAGE_CLASS
 from google.cloud.storage.constants import MULTI_REGIONAL_LEGACY_STORAGE_CLASS
+from google.cloud.storage.constants import NEARLINE_STORAGE_CLASS
 from google.cloud.storage.constants import REGIONAL_LEGACY_STORAGE_CLASS
+from google.cloud.storage.constants import STANDARD_STORAGE_CLASS
 
 _STORAGE_HOST = _get_storage_host()
 
@@ -143,6 +144,7 @@ class Blob(_PropertyMixin):
         STANDARD_STORAGE_CLASS,
         NEARLINE_STORAGE_CLASS,
         COLDLINE_STORAGE_CLASS,
+        ARCHIVE_STORAGE_CLASS,
         MULTI_REGIONAL_LEGACY_STORAGE_CLASS,
         REGIONAL_LEGACY_STORAGE_CLASS,
     )
@@ -1656,6 +1658,7 @@ def update_storage_class(self, new_class, client=None):
             new storage class for the object.   One of:
             :attr:`~google.cloud.storage.constants.NEARLINE_STORAGE_CLASS`,
             :attr:`~google.cloud.storage.constants.COLDLINE_STORAGE_CLASS`,
+            :attr:`~google.cloud.storage.constants.ARCHIVE_STORAGE_CLASS`,
             :attr:`~google.cloud.storage.constants.STANDARD_STORAGE_CLASS`,
             :attr:`~google.cloud.storage.constants.MULTI_REGIONAL_LEGACY_STORAGE_CLASS`,
             or
@@ -1951,6 +1954,7 @@ def kms_key_name(self):
         :attr:`~google.cloud.storage.constants.STANDARD_STORAGE_CLASS`,
         :attr:`~google.cloud.storage.constants.NEARLINE_STORAGE_CLASS`,
         :attr:`~google.cloud.storage.constants.COLDLINE_STORAGE_CLASS`,
+        :attr:`~google.cloud.storage.constants.ARCHIVE_STORAGE_CLASS`,
         :attr:`~google.cloud.storage.constants.MULTI_REGIONAL_LEGACY_STORAGE_CLASS`,
         :attr:`~google.cloud.storage.constants.REGIONAL_LEGACY_STORAGE_CLASS`,
         :attr:`~google.cloud.storage.constants.DURABLE_REDUCED_AVAILABILITY_STORAGE_CLASS`,
diff --git a/storage/google/cloud/storage/bucket.py b/storage/google/cloud/storage/bucket.py
index 48ab09e23e4f..764bd385789b 100644
--- a/storage/google/cloud/storage/bucket.py
+++ b/storage/google/cloud/storage/bucket.py
@@ -39,6 +39,7 @@
 from google.cloud.storage.acl import BucketACL
 from google.cloud.storage.acl import DefaultObjectACL
 from google.cloud.storage.blob import Blob
+from google.cloud.storage.constants import ARCHIVE_STORAGE_CLASS
 from google.cloud.storage.constants import COLDLINE_STORAGE_CLASS
 from google.cloud.storage.constants import DUAL_REGION_LOCATION_TYPE
 from google.cloud.storage.constants import (
@@ -402,6 +403,7 @@ class Bucket(_PropertyMixin):
         STANDARD_STORAGE_CLASS,
         NEARLINE_STORAGE_CLASS,
         COLDLINE_STORAGE_CLASS,
+        ARCHIVE_STORAGE_CLASS,
         MULTI_REGIONAL_LEGACY_STORAGE_CLASS,  # legacy
         REGIONAL_LEGACY_STORAGE_CLASS,  # legacy
         DURABLE_REDUCED_AVAILABILITY_LEGACY_STORAGE_CLASS,  # legacy
@@ -1634,6 +1636,7 @@ def storage_class(self):
             If set, one of
             :attr:`~google.cloud.storage.constants.NEARLINE_STORAGE_CLASS`,
             :attr:`~google.cloud.storage.constants.COLDLINE_STORAGE_CLASS`,
+            :attr:`~google.cloud.storage.constants.ARCHIVE_STORAGE_CLASS`,
             :attr:`~google.cloud.storage.constants.STANDARD_STORAGE_CLASS`,
             :attr:`~google.cloud.storage.constants.MULTI_REGIONAL_LEGACY_STORAGE_CLASS`,
             :attr:`~google.cloud.storage.constants.REGIONAL_LEGACY_STORAGE_CLASS`,
@@ -1654,6 +1657,7 @@ def storage_class(self, value):
             One of
             :attr:`~google.cloud.storage.constants.NEARLINE_STORAGE_CLASS`,
             :attr:`~google.cloud.storage.constants.COLDLINE_STORAGE_CLASS`,
+            :attr:`~google.cloud.storage.constants.ARCHIVE_STORAGE_CLASS`,
             :attr:`~google.cloud.storage.constants.STANDARD_STORAGE_CLASS`,
             :attr:`~google.cloud.storage.constants.MULTI_REGIONAL_LEGACY_STORAGE_CLASS`,
             :attr:`~google.cloud.storage.constants.REGIONAL_LEGACY_STORAGE_CLASS`,
diff --git a/storage/google/cloud/storage/constants.py b/storage/google/cloud/storage/constants.py
index e93d3ab29546..fa281649da29 100644
--- a/storage/google/cloud/storage/constants.py
+++ b/storage/google/cloud/storage/constants.py
@@ -24,6 +24,9 @@
 COLDLINE_STORAGE_CLASS = "COLDLINE"
 """Storage class for objects accessed at most once per year."""
 
+ARCHIVE_STORAGE_CLASS = "ARCHIVE"
+"""Storage class for objects accessed less frequently than once per year."""
+
 MULTI_REGIONAL_LEGACY_STORAGE_CLASS = "MULTI_REGIONAL"
 """Legacy storage class.
 
diff --git a/storage/tests/unit/test_bucket.py b/storage/tests/unit/test_bucket.py
index de943339e200..2eb6f7d57561 100644
--- a/storage/tests/unit/test_bucket.py
+++ b/storage/tests/unit/test_bucket.py
@@ -1773,6 +1773,15 @@ def test_storage_class_setter_COLDLINE(self):
         self.assertEqual(bucket.storage_class, COLDLINE_STORAGE_CLASS)
         self.assertTrue("storageClass" in bucket._changes)
 
+    def test_storage_class_setter_ARCHIVE(self):
+        from google.cloud.storage.constants import ARCHIVE_STORAGE_CLASS
+
+        NAME = "name"
+        bucket = self._make_one(name=NAME)
+        bucket.storage_class = ARCHIVE_STORAGE_CLASS
+        self.assertEqual(bucket.storage_class, ARCHIVE_STORAGE_CLASS)
+        self.assertTrue("storageClass" in bucket._changes)
+
     def test_storage_class_setter_MULTI_REGIONAL(self):
         from google.cloud.storage.constants import MULTI_REGIONAL_LEGACY_STORAGE_CLASS