diff --git a/starlette/request.py b/starlette/request.py
index 388d9be4..49d19510 100644
--- a/starlette/request.py
+++ b/starlette/request.py
@@ -1,5 +1,6 @@
 from starlette.datastructures import URL, Headers, QueryParams
 from collections.abc import Mapping
+from urllib.parse import unquote
 import json
 import typing
 
@@ -37,11 +38,23 @@ class Request(Mapping):
                 url = "%s://%s%s" % (scheme, host, path)
 
             if query_string:
-                url += "?" + query_string.decode()
+                url += "?" + unquote(query_string.decode())
 
             self._url = URL(url)
         return self._url
 
+    @property
+    def relative_url(self) -> URL:
+        if not hasattr(self, "_relative_url"):
+            url = self._scope["path"]
+            query_string = self._scope["query_string"]
+
+            if query_string:
+                url += "?" + unquote(query_string.decode())
+
+            self._relative_url = URL(url)
+        return self._relative_url
+
     @property
     def headers(self) -> Headers:
         if not hasattr(self, "_headers"):
diff --git a/tests/test_request.py b/tests/test_request.py
index fbbc4cd9..ac904120 100644
--- a/tests/test_request.py
+++ b/tests/test_request.py
@@ -19,6 +19,24 @@ def test_request_url():
     assert response.json() == {"method": "GET", "url": "https://example.org:123/"}
 
 
+def test_request_relative_url():
+    def app(scope):
+        async def asgi(receive, send):
+            request = Request(scope, receive)
+            data = {"method": request.method, "relative_url": request.relative_url}
+            response = JSONResponse(data)
+            await response(receive, send)
+
+        return asgi
+
+    client = TestClient(app)
+    response = client.get("/123?a=abc")
+    assert response.json() == {"method": "GET", "relative_url": "/123?a=abc"}
+
+    response = client.get("https://example.org:123/")
+    assert response.json() == {"method": "GET", "relative_url": "/"}
+
+
 def test_request_query_params():
     def app(scope):
         async def asgi(receive, send):