diff --git a/markdown2svg.cabal b/markdown2svg.cabal
--- a/markdown2svg.cabal
+++ b/markdown2svg.cabal
@@ -2,7 +2,7 @@
 cabal-version:	>=1.8
 
 name:		markdown2svg
-version:	0.0.1.21
+version:	0.0.1.22
 stability:	Experimental
 author:		Yoshikuni Jujo <PAF01143@nifty.ne.jp>
 maintainer:	Yoshikuni Jujo <PAF01143@nifty.ne.jp>
@@ -31,7 +31,7 @@
 source-repository	this
   type:		git
   location:	git://github.com/YoshikuniJujo/markdown2svg.git
-  tag:		0.0.1.21
+  tag:		0.0.1.22
 
 executable markdown2svg
   hs-source-dirs:	src
diff --git a/src/SepWords.hs b/src/SepWords.hs
--- a/src/SepWords.hs
+++ b/src/SepWords.hs
@@ -10,6 +10,9 @@
 
 splitWords_ :: Int -> Int -> String -> (String, String)
 splitWords_ _ _ "" = ("", "")
+splitWords_ n k (c : c'@('?') : cs)
+	| k > n = ([c, c'], cs)
+	| otherwise = let (l, ls) = splitWords_ n (k + 4) cs in (c : c' : l, ls)
 splitWords_ n k (c : c'@('」') : cs)
 	| k > n = ([c, c'], cs)
 	| otherwise = let (l, ls) = splitWords_ n (k + 4) cs in (c : c' : l, ls)
@@ -33,6 +36,9 @@
 
 sepWords_ :: Int -> Int -> String -> [String]
 sepWords_ _ _ "" = [""]
+sepWords_ n k (c : c'@('?') : cs)
+	| k > n = [c, c'] : sepWords_ n 0 cs
+	| otherwise = let l : ls = sepWords_ n (k + 4) cs in (c : c' : l) : ls
 sepWords_ n k (c : c'@('」') : cs)
 	| k > n = [c, c'] : sepWords_ n 0 cs
 	| otherwise = let l : ls = sepWords_ n (k + 4) cs in (c : c' : l) : ls
