diff --git a/Assets/UniGLTF/Runtime/UniGLTF/IO/glbImporter.cs b/Assets/UniGLTF/Runtime/UniGLTF/IO/glbImporter.cs
index a0d489672..ac3eabf2d 100644
--- a/Assets/UniGLTF/Runtime/UniGLTF/IO/glbImporter.cs
+++ b/Assets/UniGLTF/Runtime/UniGLTF/IO/glbImporter.cs
@@ -2,7 +2,6 @@
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
-using UnityEngine;
 
 
 namespace UniGLTF
@@ -14,7 +13,7 @@ namespace UniGLTF
 
         public static GlbChunkType ToChunkType(this string src)
         {
-            switch(src)
+            switch (src)
             {
                 case "BIN":
                     return GlbChunkType.BIN;
@@ -53,27 +52,27 @@ namespace UniGLTF
             //
             if (bytes.Length < 12)
             {
-                throw new FormatException("not glb header");
+                throw new GlbParseException("glb header not found");
             }
 
             int pos = 0;
             if (Encoding.ASCII.GetString(bytes, 0, 4) != GLB_MAGIC)
             {
-                throw new FormatException("invalid magic");
+                throw new GlbParseException("invalid magic");
             }
             pos += 4;
 
             var version = BitConverter.ToUInt32(bytes, pos);
             if (version != GLB_VERSION)
             {
-                throw new FormatException($"unknown version: {version}");
+                throw new GlbParseException($"unknown version: {version}");
             }
             pos += 4;
 
             var totalLength = BitConverter.ToUInt32(bytes, pos);
             if (bytes.Length < totalLength)
             {
-                throw new System.IO.EndOfStreamException($"Not enough size: {bytes.Length} < {totalLength}");
+                throw new GlbParseException($"not enough size: {bytes.Length} < {totalLength}");
             }
             pos += 4;
 
diff --git a/Assets/UniGLTF/Runtime/UniGLTF/UniGLTFException.cs b/Assets/UniGLTF/Runtime/UniGLTF/UniGLTFException.cs
index fde2faaf8..8522e2201 100644
--- a/Assets/UniGLTF/Runtime/UniGLTF/UniGLTFException.cs
+++ b/Assets/UniGLTF/Runtime/UniGLTF/UniGLTFException.cs
@@ -14,4 +14,12 @@ namespace UniGLTF
         public UniGLTFNotSupportedException(string fmt, params object[] args) : this(string.Format(fmt, args)) { }
         public UniGLTFNotSupportedException(string msg) : base(msg) { }
     }
+
+    /// <summary>
+    /// Exception in parse the glb header
+    /// </summary>
+    public class GlbParseException : UniGLTFException
+    {
+        public GlbParseException(string msg) : base(msg) { }
+    }
 }
diff --git a/Assets/UniGLTF/Tests/UniGLTF/GlbParserTests.cs b/Assets/UniGLTF/Tests/UniGLTF/GlbParserTests.cs
index ae99dba8c..9c36ec786 100644
--- a/Assets/UniGLTF/Tests/UniGLTF/GlbParserTests.cs
+++ b/Assets/UniGLTF/Tests/UniGLTF/GlbParserTests.cs
@@ -66,7 +66,7 @@ namespace UniGLTF
             // glb header + 1st chunk only
             var mod = bytes.Take(12 + 8 + data.Chunks[0].Bytes.Count).ToArray();
 
-            Assert.Throws<EndOfStreamException>(() =>
+            Assert.Throws<GlbParseException>(() =>
             {
                 // 再パース
                 var data2 = new GlbBinaryParser(mod, Path.GetFileNameWithoutExtension(path)).Parse();