diff --git a/sentry_sdk/consts.py b/sentry_sdk/consts.py
index 20ae39c83a..9bad8aa7db 100644
--- a/sentry_sdk/consts.py
+++ b/sentry_sdk/consts.py
@@ -1202,6 +1202,13 @@ class SPANDATA:
     Example: ["AtexitIntegration", "StdlibIntegration"]
     """
 
+    USER_AGENT_ORIGINAL = "user_agent.original"
+    """
+    Value of the HTTP User-Agent header sent by the client.
+
+    Used in inbound filters.
+    """
+
 
 class SPANSTATUS:
     """
diff --git a/sentry_sdk/integrations/wsgi.py b/sentry_sdk/integrations/wsgi.py
index ab04308f6e..db1ee06a4e 100644
--- a/sentry_sdk/integrations/wsgi.py
+++ b/sentry_sdk/integrations/wsgi.py
@@ -138,6 +138,10 @@ def __call__(
                             forwarded_host_header=environ.get("HTTP_X_FORWARDED_HOST"),
                         ),
                     )
+                    if environ.get("HTTP_USER_AGENT"):
+                        scope.set_attribute(
+                            SPANDATA.USER_AGENT_ORIGINAL, environ["HTTP_USER_AGENT"]
+                        )
 
                     method = environ.get("REQUEST_METHOD", "").upper()
 
diff --git a/tests/integrations/wsgi/test_wsgi.py b/tests/integrations/wsgi/test_wsgi.py
index c0556aa37a..2cda3a1b98 100644
--- a/tests/integrations/wsgi/test_wsgi.py
+++ b/tests/integrations/wsgi/test_wsgi.py
@@ -1361,7 +1361,7 @@ def test_error_event_no_user_ip_address_without_remote_addr(
         ),
     ],
 )
-def test_is_localhost_span_attribute(
+def test_is_localhost_attribute(
     sentry_init, capture_items, client_kwargs, is_localhost
 ):
     def dogpark(environ, start_response):
@@ -1384,3 +1384,30 @@ def dogpark(environ, start_response):
 
     assert server_span["attributes"]["sentry.is_localhost"] is is_localhost
     assert child_span["attributes"]["sentry.is_localhost"] is is_localhost
+
+
+def test_user_agent_attribute(sentry_init, capture_items):
+    def dogpark(environ, start_response):
+        with sentry_sdk.traces.start_span(name="child-span"):
+            pass
+        start_response("200 OK", [])
+        return ["woof"]
+
+    sentry_init(
+        traces_sample_rate=1.0,
+        trace_lifecycle="stream",
+    )
+
+    app = SentryWsgiMiddleware(dogpark)
+    client = Client(app)
+
+    items = capture_items("span")
+
+    client.get("/dogs/", headers={"User-Agent": "TestBrowser/1.0"})
+
+    sentry_sdk.flush()
+
+    child_span, server_span = [item.payload for item in items]
+
+    assert server_span["attributes"]["user_agent.original"] == "TestBrowser/1.0"
+    assert child_span["attributes"]["user_agent.original"] == "TestBrowser/1.0"