diff --git a/Assets/VRM/UniGLTF/Editor/MaterialTests.cs b/Assets/VRM/UniGLTF/Editor/MaterialTests.cs
index 015e362cab..8109ecdfd3 100644
--- a/Assets/VRM/UniGLTF/Editor/MaterialTests.cs
+++ b/Assets/VRM/UniGLTF/Editor/MaterialTests.cs
@@ -1,4 +1,5 @@
 using NUnit.Framework;
+using UnityEngine;
 
 
 namespace UniGLTF
@@ -176,5 +177,17 @@ public void MaterialImportTest()
                 Assert.AreEqual("Standard", material.shader.name);
             }
         }
+
+        [Test]
+        public void MaterialExportTest()
+        {
+            var material = new Material(Shader.Find("Standard"));
+            material.SetColor("_EmissionColor", new Color(0, 1, 2, 1));
+            var materialExporter = new MaterialExporter();
+            var textureExportManager = new TextureExportManager(new Texture[] { });
+            var gltfMaterial = materialExporter.ExportMaterial(material, textureExportManager);
+
+            Assert.AreEqual(gltfMaterial.emissiveFactor, new float[] { 0, 0.5f, 1 });
+        }
     }
 }
diff --git a/Assets/VRM/UniGLTF/Scripts/IO/MaterialExporter.cs b/Assets/VRM/UniGLTF/Scripts/IO/MaterialExporter.cs
index 3d2df3235d..613971d76f 100644
--- a/Assets/VRM/UniGLTF/Scripts/IO/MaterialExporter.cs
+++ b/Assets/VRM/UniGLTF/Scripts/IO/MaterialExporter.cs
@@ -135,6 +135,10 @@ static void Export_Emission(Material m, TextureExportManager textureManager, glT
             if (m.HasProperty("_EmissionColor"))
             {
                 var color = m.GetColor("_EmissionColor");
+                if (color.maxColorComponent > 1)
+                {
+                    color /= color.maxColorComponent;
+                }
                 material.emissiveFactor = new float[] { color.r, color.g, color.b };
             }