diff --git a/Makefile b/Makefile
index 737c2985..ea71bca4 100644
--- a/Makefile
+++ b/Makefile
@@ -12,7 +12,6 @@ PICRIN_LIBS = \
 	piclib/picrin/macro.scm\
 	piclib/picrin/record.scm\
 	piclib/picrin/array.scm\
-	piclib/picrin/dictionary.scm\
 	piclib/picrin/experimental/lambda.scm\
 	piclib/picrin/syntax-rules.scm\
 	piclib/picrin/test.scm
diff --git a/contrib/10.srfi/srfi/17.scm b/contrib/10.srfi/srfi/17.scm
index c1bed0d0..fe1a85fe 100644
--- a/contrib/10.srfi/srfi/17.scm
+++ b/contrib/10.srfi/srfi/17.scm
@@ -2,7 +2,6 @@
 
   (import (except (scheme base) set!)
           (prefix (only (scheme base) set!) %)
-          (picrin dictionary)
           (except (picrin base) set!)
           (srfi 1)
           (srfi 8))
diff --git a/contrib/20.repl/repl.scm b/contrib/20.repl/repl.scm
index 60411749..3afd70c8 100644
--- a/contrib/20.repl/repl.scm
+++ b/contrib/20.repl/repl.scm
@@ -30,7 +30,6 @@
             (scheme lazy)
             (scheme time)
             (picrin macro)
-            (picrin dictionary)
             (picrin array)
             (picrin library))
    '(picrin user))
diff --git a/piclib/picrin/dictionary.scm b/piclib/picrin/dictionary.scm
deleted file mode 100644
index 1a789c7f..00000000
--- a/piclib/picrin/dictionary.scm
+++ /dev/null
@@ -1,14 +0,0 @@
-(define-library (picrin dictionary)
-  (import (picrin base))
-
-  (export dictionary?
-          dictionary
-          make-dictionary
-          dictionary-ref
-          dictionary-set!
-          dictionary-delete!
-          dictionary-size
-          dictionary->plist
-          plist->dictionary
-          dictionary->alist
-          alist->dictionary))