diff --git a/train/bin/split_corpus.py b/train/bin/split_corpus.py
new file mode 100755
index 0000000..4dda3b8
--- /dev/null
+++ b/train/bin/split_corpus.py
@@ -0,0 +1,106 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+
+"""
+코퍼스를 train/dev/test로 분할한다.
+__author__ = 'Jamie (jamie.lim@kakaocorp.com)'
+__copyright__ = 'Copyright (C) 2019-, Kakao Corp. All rights reserved.'
+"""
+
+
+###########
+# imports #
+###########
+from argparse import ArgumentParser, Namespace
+import logging
+import random
+import sys
+from typing import Iterator, List, TextIO
+
+
+#############
+# functions #
+#############
+def _sents(fin: TextIO) -> Iterator[List[str]]:
+    """
+    read from file and yield a sentence (generator)
+    Args:
+        fin:  input file
+    Yields:
+        sentence (list of lines)
+    """
+    sent = []
+    for line in fin:
+        line = line.rstrip('\r\n')
+        if not line:
+            if sent:
+                yield sent
+                sent = []
+            continue
+        sent.append(line)
+    if sent:
+        yield sent
+
+
+def _write_to_file(path: str, sents: List[List[str]]):
+    """
+    파일에 쓴다.
+    Args:
+        path:  path
+        sents:  sentences
+    """
+    with open(path, 'w', encoding='UTF-8') as fout:
+        for sent in sents:
+            print('\n'.join(sent), file=fout)
+            print(file=fout)
+
+
+def run(args: Namespace):
+    """
+    run function which is the start point of program
+    Args:
+        args:  program arguments
+    """
+    sents = []
+    for num, sent in enumerate(_sents(sys.stdin), start=1):
+        if num % 100000 == 0:
+            logging.info('%d00k-th sent..', num // 100000)
+        sents.append(sent)
+    random.shuffle(sents)
+    _write_to_file('{}.dev'.format(args.out_pfx), sents[:args.dev])
+    _write_to_file('{}.test'.format(args.out_pfx), sents[args.dev:args.dev+args.test])
+    _write_to_file('{}.train'.format(args.out_pfx), sents[args.dev+args.test:])
+    logging.info('dev / test / train: %d / %d / %d', args.dev, args.test,
+                 len(sents[args.dev+args.test:]))
+
+
+########
+# main #
+########
+def main():
+    """
+    main function processes only argument parsing
+    """
+    parser = ArgumentParser(description='코퍼스를 train/dev/test로 분할한다.')
+    parser.add_argument('-o', '--out-pfx', help='output file prefix', metavar='NAME', required=True)
+    parser.add_argument('--input', help='input file <default: stdin>', metavar='FILE')
+    parser.add_argument('--dev', help='number of sentence in dev set', metavar='NUM', type=int,
+                        default=5000)
+    parser.add_argument('--test', help='number of sentence in test set', metavar='NUM', type=int,
+                        default=5000)
+    parser.add_argument('--debug', help='enable debug', action='store_true')
+    args = parser.parse_args()
+
+    if args.input:
+        sys.stdin = open(args.input, 'r', encoding='UTF-8')
+    if args.debug:
+        logging.basicConfig(level=logging.DEBUG)
+    else:
+        logging.basicConfig(level=logging.INFO)
+
+    run(args)
+
+
+if __name__ == '__main__':
+    main()