diff -ur v35/ezmd.py v36/ezmd.py
--- v35/ezmd.py	2019-10-15 20:11:07.000000000 +0900
+++ v36/ezmd.py	2019-10-15 20:40:16.000000000 +0900
@@ -750,6 +750,9 @@
 	res = do_index(hd_names)
 	return res
 
+def cut_comment(buf):
+	return list( filter( lambda s: not s.startswith('#'), buf ) )
+
 def pre_split_esc_join(s, delim):
 	buf = s.split(delim)
 
@@ -759,7 +762,7 @@
 	e = buf_loop_new(buf, is_call, func)			
 	e.run()
 
-	f = lambda buf: buf if buf and buf[0] == 'pre' else esc_join(buf, delim)	
+	f = lambda buf: buf if buf and buf[0] == 'pre' else esc_join( cut_comment(buf), delim)
 	return sum( map(f, lst), [] )
 
 def yaml_dump(o):