diff --git a/moto/s3/models.py b/moto/s3/models.py
index 8acb65448..a737340b3 100644
--- a/moto/s3/models.py
+++ b/moto/s3/models.py
@@ -64,5 +64,9 @@ class S3Backend(BaseBackend):
         bucket = self.buckets[bucket_name]
         return bucket.keys.pop(key_name)
 
+    def copy_key(self, src_bucket_name, src_key_name, dest_bucket_name, dest_key_name):
+        src_bucket = self.buckets[src_bucket_name]
+        dest_bucket = self.buckets[dest_bucket_name]
+        dest_bucket.keys[dest_key_name] = src_bucket.keys[src_key_name]
 
 s3_backend = S3Backend()
diff --git a/moto/s3/responses.py b/moto/s3/responses.py
index 10445eda2..74f80ec81 100644
--- a/moto/s3/responses.py
+++ b/moto/s3/responses.py
@@ -1,7 +1,7 @@
 from jinja2 import Template
 
 from .models import s3_backend
-from .utils import bucket_name_from_hostname
+from .utils import bucket_name_from_hostname, headers_to_dict
 
 
 def all_buckets(uri, body, method):
@@ -51,6 +51,7 @@ def key_response(uri_info, body, headers):
     key_name = uri_info.path.lstrip('/')
     hostname = uri_info.hostname
     method = uri_info.method
+    headers = headers_to_dict(headers)
 
     bucket_name = bucket_name_from_hostname(hostname)
 
@@ -59,6 +60,11 @@ def key_response(uri_info, body, headers):
         return key.value
 
     if method == 'PUT':
+        if 'x-amz-copy-source' in headers:
+            # Copy key
+            src_bucket, src_key = headers.get("x-amz-copy-source").split("/")
+            s3_backend.copy_key(src_bucket, src_key, bucket_name, key_name)
+            return S3_OBJECT_COPY_RESPONSE
         if body:
             new_key = s3_backend.set_key(bucket_name, key_name, body)
             return S3_OBJECT_RESPONSE, dict(etag=new_key.etag)
@@ -147,4 +153,11 @@ S3_OBJECT_RESPONSE = """<PutObjectResponse xmlns="http://s3.amazonaws.com/doc/20
         <ETag>&quot;asdlfkdalsjfsalfkjsadlfjsdjkk&quot;</ETag>
         <LastModified>2006-03-01T12:00:00.183Z</LastModified>
       </PutObjectResponse>
-    </PutObjectResponse>"""
\ No newline at end of file
+    </PutObjectResponse>"""
+
+S3_OBJECT_COPY_RESPONSE = """<CopyObjectResponse xmlns="http://doc.s3.amazonaws.com/2006-03-01">
+  <CopyObjectResponse>
+    <ETag>"asdfadsfdsafjsadfdafsadf"</ETag>
+    <LastModified>2008-02-18T13:54:10.183Z</LastModified>
+  </CopyObjectResponse>
+</CopyObjectResponse>"""
diff --git a/moto/s3/utils.py b/moto/s3/utils.py
index 4f1325aae..40cbf99f0 100644
--- a/moto/s3/utils.py
+++ b/moto/s3/utils.py
@@ -6,3 +6,13 @@ bucket_name_regex = re.compile("(.+).s3.amazonaws.com")
 def bucket_name_from_hostname(hostname):
     bucket_result = bucket_name_regex.search(hostname)
     return bucket_result.groups()[0]
+
+
+def headers_to_dict(headers):
+    result = {}
+    for header in headers.split("\r\n"):
+        if ':' in header:
+            key, value = header.split(":", 1)
+            result[key.strip()] = value.strip()
+
+    return result
diff --git a/tests/test_s3/test_s3.py b/tests/test_s3/test_s3.py
index cff2899d4..16189aa33 100644
--- a/tests/test_s3/test_s3.py
+++ b/tests/test_s3/test_s3.py
@@ -40,6 +40,20 @@ def test_missing_key():
     bucket.get_key("the-key").should.equal(None)
 
 
+@mock_s3
+def test_copy_key():
+    conn = boto.connect_s3('the_key', 'the_secret')
+    bucket = conn.create_bucket("foobar")
+    key = Key(bucket)
+    key.key = "the-key"
+    key.set_contents_from_string("some value")
+
+    bucket.copy_key('new-key', 'foobar', 'the-key')
+
+    bucket.get_key("the-key").get_contents_as_string().should.equal("some value")
+    bucket.get_key("new-key").get_contents_as_string().should.equal("some value")
+
+
 @mock_s3
 def test_missing_bucket():
     conn = boto.connect_s3('the_key', 'the_secret')