diff --git a/cinder/tests/unit/volume/drivers/test_rbd.py b/cinder/tests/unit/volume/drivers/test_rbd.py
index 43a58573fbb..4fe605ffc67 100644
--- a/cinder/tests/unit/volume/drivers/test_rbd.py
+++ b/cinder/tests/unit/volume/drivers/test_rbd.py
@@ -151,7 +151,6 @@ class RBDTestCase(test.TestCase):
         super(RBDTestCase, self).setUp()
 
         self.cfg = mock.Mock(spec=conf.Configuration)
-        self.cfg.volume_tmp_dir = None
         self.cfg.image_conversion_dir = None
         self.cfg.rbd_cluster_name = 'nondefault'
         self.cfg.rbd_pool = 'rbd'
@@ -804,13 +803,11 @@ class RBDTestCase(test.TestCase):
 
     @common_mocks
     def test_copy_image_no_volume_tmp(self):
-        self.cfg.volume_tmp_dir = None
         self.cfg.image_conversion_dir = None
         self._copy_image()
 
     @common_mocks
     def test_copy_image_volume_tmp(self):
-        self.cfg.volume_tmp_dir = None
         self.cfg.image_conversion_dir = '/var/run/cinder/tmp'
         self._copy_image()
 
diff --git a/cinder/volume/drivers/rbd.py b/cinder/volume/drivers/rbd.py
index 888ed83e45e..f7874cbaf10 100644
--- a/cinder/volume/drivers/rbd.py
+++ b/cinder/volume/drivers/rbd.py
@@ -65,11 +65,6 @@ RBD_OPTS = [
     cfg.StrOpt('rbd_secret_uuid',
                help='The libvirt uuid of the secret for the rbd_user '
                     'volumes'),
-    cfg.StrOpt('volume_tmp_dir',
-               help='Directory where temporary image files are stored '
-                    'when the volume driver does not write them directly '
-                    'to the volume.  Warning: this option is now deprecated, '
-                    'please use image_conversion_dir instead.'),
     cfg.IntOpt('rbd_max_clone_depth',
                default=5,
                help='Maximum number of nested volume clones that are '
@@ -840,14 +835,9 @@ class RBDDriver(driver.TransferVD, driver.ExtendVD,
         return ({}, False)
 
     def _image_conversion_dir(self):
-        tmpdir = (self.configuration.volume_tmp_dir or
-                  CONF.image_conversion_dir or
+        tmpdir = (CONF.image_conversion_dir or
                   tempfile.gettempdir())
 
-        if tmpdir == self.configuration.volume_tmp_dir:
-            LOG.warning(_LW('volume_tmp_dir is now deprecated, please use '
-                            'image_conversion_dir.'))
-
         # ensure temporary directory exists
         if not os.path.exists(tmpdir):
             os.makedirs(tmpdir)
diff --git a/releasenotes/notes/remove_volume_tmp_dir_option-c83c5341e5a42378.yaml b/releasenotes/notes/remove_volume_tmp_dir_option-c83c5341e5a42378.yaml
new file mode 100644
index 00000000000..0763cbc9956
--- /dev/null
+++ b/releasenotes/notes/remove_volume_tmp_dir_option-c83c5341e5a42378.yaml
@@ -0,0 +1,7 @@
+---
+upgrade:
+  - The RBD driver no longer uses the "volume_tmp_dir"
+    option to set where temporary files for image conversion
+    are stored.  Set "image_conversion_dir" to configure this
+    in Ocata.
+