diff --git a/requests/adapters.py b/requests/adapters.py
index c350ae44..d4f5d5b4 100644
--- a/requests/adapters.py
+++ b/requests/adapters.py
@@ -9,6 +9,7 @@ and maintain connections.
 """
 
 import socket
+import datetime
 
 from .models import Response
 from .packages.urllib3.poolmanager import PoolManager, ProxyManager
@@ -155,6 +156,7 @@ class HTTPAdapter(BaseAdapter):
         url = self.request_url(request, proxies)
 
         chunked = not (request.body is None or 'Content-Length' in request.headers)
+        start = datetime.datetime.utcnow()
 
         try:
             if not chunked:
@@ -198,6 +200,7 @@ class HTTPAdapter(BaseAdapter):
                     preload_content=False,
                     decode_content=False
                 )
+            finish = datetime.datetime.utcnow()
 
         except socket.error as sockerr:
             raise ConnectionError(sockerr)
@@ -214,6 +217,7 @@ class HTTPAdapter(BaseAdapter):
                 raise Timeout('Request timed out.')
 
         r = self.build_response(request, resp)
+        r.elapsed = finish - start
 
         if not stream:
             r.content
diff --git a/requests/models.py b/requests/models.py
index d86b80ae..a9e8c5ba 100644
--- a/requests/models.py
+++ b/requests/models.py
@@ -9,6 +9,7 @@ This module contains the primary objects that power Requests.
 
 import collections
 import logging
+import datetime
 
 from io import BytesIO
 from .hooks import default_hooks
@@ -471,6 +472,10 @@ class Response(object):
         #: A CookieJar of Cookies the server sent back.
         self.cookies = cookiejar_from_dict({})
 
+        #: The amount of time elapsed between sending the request
+        #: and the arrival of the response (as a timedelta)
+        self.elapsed = datetime.timedelta(0)
+
     def __repr__(self):
         return '<Response [%s]>' % (self.status_code)
 
diff --git a/test_requests.py b/test_requests.py
index 6a4409b1..d5409aa7 100644
--- a/test_requests.py
+++ b/test_requests.py
@@ -323,5 +323,10 @@ class RequestsTestCase(unittest.TestCase):
         self.assertEqual(cookie.domain, domain)
         self.assertEqual(cookie._rest['HttpOnly'], rest['HttpOnly'])
 
+    def test_time_elapsed_blank(self):
+        r = requests.get(httpbin('get'))
+        self.assertTrue(r.elapsed.total_seconds() > 0.0)
+
+
 if __name__ == '__main__':
     unittest.main()