diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7c40da47b33..6260a6b2d34 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -35,6 +35,7 @@
 * [ENHANCEMENT] Added per tenant metrics for queries and chunks and bytes read from chunk store: #2463
   * `cortex_chunk_store_fetched_chunks_total` and `cortex_chunk_store_fetched_chunk_bytes_total`
   * `cortex_query_frontend_queries_total` (per tenant queries counted by the frontend)
+* [ENHANCEMENT] query-frontend now also logs the POST data of long queries. #2481
 * [BUGFIX] Fixes #2411, Ensure requests are properly routed to the prometheus api embedded in the query if `-server.path-prefix` is set. #2372
 * [BUGFIX] Experimental TSDB: fixed chunk data corruption when querying back series using the experimental blocks storage. #2400
 * [BUGFIX] Cassandra Storage: Fix endpoint TLS host verification. #2109
diff --git a/pkg/querier/frontend/frontend.go b/pkg/querier/frontend/frontend.go
index 1306646c568..f8f8a8ddaa1 100644
--- a/pkg/querier/frontend/frontend.go
+++ b/pkg/querier/frontend/frontend.go
@@ -163,7 +163,16 @@ func (f *Frontend) handle(w http.ResponseWriter, r *http.Request) {
 	queryResponseTime := time.Since(startTime)
 
 	if f.cfg.LogQueriesLongerThan > 0 && queryResponseTime > f.cfg.LogQueriesLongerThan {
-		level.Info(f.log).Log("msg", "slow query", "org_id", userID, "url", fmt.Sprintf("http://%s", r.Host+r.RequestURI), "time_taken", queryResponseTime.String())
+		logMessage := []interface{}{"msg", "slow query",
+			"org_id", userID,
+			"url", fmt.Sprintf("http://%s", r.Host+r.RequestURI),
+			"time_taken", queryResponseTime.String(),
+		}
+		pf := r.PostForm.Encode()
+		if pf != "" {
+			logMessage = append(logMessage, "body", pf)
+		}
+		level.Info(f.log).Log(logMessage...)
 	}
 
 	if err != nil {