diff --git a/CHANGELOG.md b/CHANGELOG.md
index c29152e2..3f51a47b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,7 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### :sparkles: Release Note <!-- optional -->
 
 ### :rocket: Enhancements
-- ...
+- [#1845](https://github.com/reviewdog/reviewdog/pull/1845) Normalize file path in `related_locations` too.
 
 ### :bug: Fixes
 - ...
diff --git a/filter/filter.go b/filter/filter.go
index eef96a94..3e9d9297 100644
--- a/filter/filter.go
+++ b/filter/filter.go
@@ -41,7 +41,6 @@ func FilterCheck(results []*rdf.Diagnostic, diff []*diff.FileDiff, strip int,
 	for _, result := range results {
 		check := &FilteredDiagnostic{Diagnostic: result, SourceLines: make(map[int]string)}
 		loc := result.GetLocation()
-		loc.Path = pathutil.NormalizePath(loc.GetPath(), cwd, "")
 		startLine := int(loc.GetRange().GetStart().GetLine())
 		endLine := int(loc.GetRange().GetEnd().GetLine())
 		if endLine == 0 {
diff --git a/pathutil/pathutil.go b/pathutil/pathutil.go
index a714660a..0e8dc929 100644
--- a/pathutil/pathutil.go
+++ b/pathutil/pathutil.go
@@ -3,6 +3,8 @@ package pathutil
 import (
 	"path/filepath"
 	"strings"
+
+	"github.com/reviewdog/reviewdog/proto/rdf"
 )
 
 // NormalizePath return normalized path with workdir and relative path to
@@ -42,6 +44,22 @@ func NormalizeDiffPath(diffpath string, strip int) string {
 	return filepath.ToSlash(filepath.Clean(path))
 }
 
+// NormalizePathInResults normalize file path in RDFormat results.
+func NormalizePathInResults(results []*rdf.Diagnostic, cwd string) {
+	for _, result := range results {
+		normalizeLocation(result.GetLocation(), cwd)
+		for _, rel := range result.GetRelatedLocations() {
+			normalizeLocation(rel.GetLocation(), cwd)
+		}
+	}
+}
+
+func normalizeLocation(loc *rdf.Location, cwd string) {
+	if loc != nil {
+		loc.Path = NormalizePath(loc.GetPath(), cwd, "")
+	}
+}
+
 func contains(path, base string) bool {
 	ps := splitPathList(path)
 	bs := splitPathList(base)
diff --git a/pathutil/pathutil_test.go b/pathutil/pathutil_test.go
new file mode 100644
index 00000000..7ff63333
--- /dev/null
+++ b/pathutil/pathutil_test.go
@@ -0,0 +1,49 @@
+package pathutil
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/reviewdog/reviewdog/proto/rdf"
+)
+
+func TestNormalizePathInResults(t *testing.T) {
+	cwd := "/path/to/cwd"
+	results := []*rdf.Diagnostic{
+		{
+			Location: &rdf.Location{
+				Path: cwd + "/" + "sample_1_abs.txt",
+			},
+		},
+		{
+			Location: &rdf.Location{
+				Path: "sample_2_rel.txt",
+			},
+		},
+		{
+			RelatedLocations: []*rdf.RelatedLocation{
+				{
+					Location: &rdf.Location{
+						Path: cwd + "/" + "sample_related_1_abs.txt",
+					},
+				},
+				{
+					Location: &rdf.Location{
+						Path: "sample_related_2_rel.txt",
+					},
+				},
+			},
+		},
+	}
+	NormalizePathInResults(results, cwd)
+	for _, result := range results {
+		if strings.HasPrefix(result.GetLocation().GetPath(), cwd) {
+			t.Errorf("path unexpectedly contain prefix: %s", result.GetLocation().GetPath())
+		}
+		for _, rel := range result.GetRelatedLocations() {
+			if strings.HasPrefix(rel.GetLocation().GetPath(), cwd) {
+				t.Errorf("related locations path unexpectedly contain prefix: %s", rel.GetLocation().GetPath())
+			}
+		}
+	}
+}
diff --git a/reviewdog.go b/reviewdog.go
index ed324275..08e8b5f8 100644
--- a/reviewdog.go
+++ b/reviewdog.go
@@ -10,6 +10,7 @@ import (
 	"github.com/reviewdog/reviewdog/diff"
 	"github.com/reviewdog/reviewdog/filter"
 	"github.com/reviewdog/reviewdog/parser"
+	"github.com/reviewdog/reviewdog/pathutil"
 	"github.com/reviewdog/reviewdog/proto/rdf"
 )
 
@@ -73,6 +74,8 @@ func (w *Reviewdog) runFromResult(ctx context.Context, results []*rdf.Diagnostic
 		return err
 	}
 
+	pathutil.NormalizePathInResults(results, wd)
+
 	checks := filter.FilterCheck(results, filediffs, strip, wd, w.filterMode)
 	hasViolations := false