diff --git a/CHANGES/3278.bugfix b/CHANGES/3278.bugfix
new file mode 100644
index 00000000000..bbc6b53b9cc
--- /dev/null
+++ b/CHANGES/3278.bugfix
@@ -0,0 +1 @@
+Keep the query string by `normalize_path_middleware`.
diff --git a/aiohttp/web_middlewares.py b/aiohttp/web_middlewares.py
index f762f5b8bf5..4e339acab85 100644
--- a/aiohttp/web_middlewares.py
+++ b/aiohttp/web_middlewares.py
@@ -91,7 +91,7 @@ async def impl(request, handler):
                 resolves, request = await _check_request_resolves(
                     request, path)
                 if resolves:
-                    raise redirect_class(request.raw_path)
+                    raise redirect_class(request.raw_path + query)
 
         return await handler(request)
 
diff --git a/tests/test_web_middleware.py b/tests/test_web_middleware.py
index e107cc17b1b..3fac4755ffc 100644
--- a/tests/test_web_middleware.py
+++ b/tests/test_web_middleware.py
@@ -1,6 +1,7 @@
 import re
 
 import pytest
+from yarl import URL
 
 from aiohttp import web
 
@@ -115,6 +116,7 @@ async def test_add_trailing_when_necessary(
 
         resp = await client.get(path)
         assert resp.status == status
+        assert resp.url.query == URL(path).query
 
     @pytest.mark.parametrize("path, status", [
         ('/resource1', 200),
@@ -136,6 +138,7 @@ async def test_remove_trailing_when_necessary(self, path, status, cli):
 
         resp = await client.get(path)
         assert resp.status == status
+        assert resp.url.query == URL(path).query
 
     @pytest.mark.parametrize("path, status", [
         ('/resource1', 200),
@@ -158,6 +161,7 @@ async def test_no_trailing_slash_when_disabled(
 
         resp = await client.get(path)
         assert resp.status == status
+        assert resp.url.query == URL(path).query
 
     @pytest.mark.parametrize("path, status", [
         ('/resource1/a/b', 200),
@@ -180,6 +184,7 @@ async def test_merge_slash(self, path, status, cli):
 
         resp = await client.get(path)
         assert resp.status == status
+        assert resp.url.query == URL(path).query
 
     @pytest.mark.parametrize("path, status", [
         ('/resource1/a/b', 200),
@@ -220,6 +225,7 @@ async def test_append_and_merge_slash(self, path, status, cli):
         client = await cli(extra_middlewares)
         resp = await client.get(path)
         assert resp.status == status
+        assert resp.url.query == URL(path).query
 
     @pytest.mark.parametrize("path, status", [
         ('/resource1/a/b', 200),
@@ -262,6 +268,7 @@ async def test_remove_and_merge_slash(self, path, status, cli):
         client = await cli(extra_middlewares)
         resp = await client.get(path)
         assert resp.status == status
+        assert resp.url.query == URL(path).query
 
     async def test_cannot_remove_and_add_slash(self):
         with pytest.raises(AssertionError):