diff --git a/scripts/check_dict.py b/scripts/check_dict.py
new file mode 100755
index 0000000..ac528f7
--- /dev/null
+++ b/scripts/check_dict.py
@@ -0,0 +1,29 @@
+#!/usr/bin/python
+
+import sys
+
+if len(sys.argv) == 1:
+    print "usage : %s dict_file1 dict_file2 ..."
+    exit(1)
+
+d = {}
+
+for fname in sys.argv[1:]:
+    with open(fname, "r") as fin:
+        for i, line in enumerate(fin):
+            try:
+                word, cnt, tag = line.strip().split(" ")
+                if word in d:
+                    print "error file[%s] line[%s] : %s" %(fname, i, line)
+                    exit(1)
+                else:
+                    d[word] = True
+                
+                if 0 >= int(cnt) :
+                    print "error file[%s] line[%s] : %s" %(fname, i, line)
+                    exit(1)
+            except Exception as err:
+                print "error file[%s] line[%s] : %s" %(fname, i, line)
+                exit(1)
+
+print "OK"