diff --git a/spec/nodejs/internal_spec.cr b/spec/nodejs/internal_spec.cr
index 4bd78cb1..a6a51998 100644
--- a/spec/nodejs/internal_spec.cr
+++ b/spec/nodejs/internal_spec.cr
@@ -85,3 +85,20 @@ describe "Replace relative path" do
     res.should eq expect_code
   end
 end
+
+describe "Scan sub dir" do
+  it "Get sub directory name" do
+    dirpaths = [] of String
+    dirpaths << "#{Internal.home_dir}/js/spec"
+    dirpaths << "#{Internal.home_dir}/js/spec2"
+    dirpaths.map { |dir| Dir.mkdir(dir) }
+    res = Internal.scanning_sub_dir
+    dirpaths.map { |dir| Dir.rmdir(dir) }
+    res.size.should eq 4
+  end
+
+  it "No get sub directory" do
+    res = Internal.scanning_sub_dir
+    res.empty?.should be_true
+  end
+end
diff --git a/spec/nodejs_spec.cr b/spec/nodejs_spec.cr
index 2e061429..8e058487 100644
--- a/spec/nodejs_spec.cr
+++ b/spec/nodejs_spec.cr
@@ -198,6 +198,15 @@ describe "Read js code file and Eval js code" do
     res["text"].to_s.empty?.should be_false
   end
 
+  it "read example js file in sub directory" do
+    subdir = "#{Nodejs::Internal.home_dir}/js/demo"
+    FileUtils.mkdir(subdir)
+    FileUtils.cp("spec/js/disp.js", "#{subdir}/disp.js")
+    res = Nodejs.file_run("spec/js/file_run.js")
+    FileUtils.rm_rf(subdir)
+    res["text"].to_s.empty?.should be_false
+  end
+
   it "Not found js file" do
     expect_raises(CrystalSideException) do
       Nodejs.file_run("spec/js/hoge_fuga.js")
diff --git a/src/nodejs.cr b/src/nodejs.cr
index a0d6c702..8556bfbc 100644
--- a/src/nodejs.cr
+++ b/src/nodejs.cr
@@ -6,7 +6,7 @@ module Nodejs
 
   NODE_PATH = "#{Internal.home_dir}/bin/node"
 
-  def eval(source_code : String, node_path : Array = [] of String) : JSON::Any
+  def eval(source_code : String) : JSON::Any
     # use make audit
     Internal.create_raw_js(source_code) unless ENV["RAW_JS"]? == nil
 
@@ -15,7 +15,7 @@ module Nodejs
     status = Process.run(
       NODE_PATH,
       args: {"-e", "#{Function.set_return_js} #{source_code}"},
-      env: Internal.setup_env(node_path),
+      env: Internal.setup_node_path(Internal.scanning_sub_dir),
       output: io,
       error: io_error
     )
diff --git a/src/nodejs/internal.cr b/src/nodejs/internal.cr
index 925dbae6..e329c097 100644
--- a/src/nodejs/internal.cr
+++ b/src/nodejs/internal.cr
@@ -22,17 +22,25 @@ module Nodejs::Internal
     {result: result, output: output}
   end
 
-  def setup_env(path : Array(String)) : Hash(String, String)
+  def setup_node_path(add_path : Array(String)) : Hash(String, String)
     js_dir = "#{ENV["HOME"]}/.crystal-nodejs/js"
     node_path = {
-      "NODE_PATH" => ".:./:#{js_dir}:#{js_dir}/node_modules:",
+      "NODE_PATH" => "#{js_dir}:#{js_dir}/node_modules:",
     }
-    if !path.empty?
-      node_path["NODE_PATH"] = "#{node_path["NODE_PATH"]}:#{path.join(":")}"
+    if !add_path.empty?
+      node_path["NODE_PATH"] = "#{node_path["NODE_PATH"]}:#{add_path.join(":")}"
     end
     node_path
   end
 
+  def scanning_sub_dir : Array(String)
+    dirs = [] of String
+    Dir.glob("#{home_dir}/js/*/") do |dir|
+      dirs << dir unless "#{home_dir}/js/node_modules/" == dir
+    end
+    dirs.clone.map { |dir| "#{dir}node_modules/" } + dirs
+  end
+
   def create_raw_js(raw : String) : Void
     hash = Digest::MD5.hexdigest(raw)
     dir = "/tmp/raw_js"