diff --git a/contrib/10.partcont/CMakeLists.txt b/contrib/10.partcont/CMakeLists.txt
index 65f16fb2..bedbbd75 100644
--- a/contrib/10.partcont/CMakeLists.txt
+++ b/contrib/10.partcont/CMakeLists.txt
@@ -1,2 +1,2 @@
-file(GLOB PARTCONT_FILES ${PROJECT_SOURCE_DIR}/contrib/10.partcont/piclib/*.scm)
+file(GLOB PARTCONT_FILES ${PICRIN_CONTRIB_DIR}/10.partcont/piclib/*.scm)
 list(APPEND PICLIB_CONTRIB_LIBS ${PARTCONT_FILES})
diff --git a/contrib/10.pretty-print/CMakeLists.txt b/contrib/10.pretty-print/CMakeLists.txt
index cf0327da..c5353018 100644
--- a/contrib/10.pretty-print/CMakeLists.txt
+++ b/contrib/10.pretty-print/CMakeLists.txt
@@ -1 +1 @@
-list(APPEND PICLIB_CONTRIB_LIBS ${PROJECT_SOURCE_DIR}/contrib/10.pretty-print/pretty-print.scm)
+list(APPEND PICLIB_CONTRIB_LIBS ${PICRIN_CONTRIB_DIR}/10.pretty-print/pretty-print.scm)
diff --git a/contrib/10.regexp/CMakeLists.txt b/contrib/10.regexp/CMakeLists.txt
index 6ab06aaa..aa177aaa 100644
--- a/contrib/10.regexp/CMakeLists.txt
+++ b/contrib/10.regexp/CMakeLists.txt
@@ -1,11 +1,14 @@
 # regex
+set(PICRIN_REGEX_DIR ${PICRIN_CONTRIB_DIR}/10.regexp)
+set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${PICRIN_REGEX_DIR}/cmake/")
+
 find_package(REGEX)
 
 if (REGEX_FOUND)
   add_definitions(${REGEX_DEFINITIONS})
   include_directories(${REGEX_INCLUDE_DIR})
 
-  file(GLOB PICRIN_REGEX_SOURCES ${PROJECT_SOURCE_DIR}/contrib/10.regexp/src/*.c)
+  file(GLOB PICRIN_REGEX_SOURCES ${PICRIN_REGEX_DIR}/src/*.c)
 
   list(APPEND PICRIN_CONTRIB_INITS regexp)
   list(APPEND PICRIN_CONTRIB_LIBRARIES ${REGEX_LIBRARIES})
diff --git a/cmake/FindREGEX.cmake b/contrib/10.regexp/cmake/FindREGEX.cmake
similarity index 100%
rename from cmake/FindREGEX.cmake
rename to contrib/10.regexp/cmake/FindREGEX.cmake
diff --git a/contrib/10.regexp/t/test.scm b/contrib/10.regexp/t/test.scm
new file mode 100644
index 00000000..b2a76f49
--- /dev/null
+++ b/contrib/10.regexp/t/test.scm
@@ -0,0 +1,11 @@
+(import (scheme base)
+        (picrin test)
+        (picrin regexp))
+
+(test #t (regexp? (regexp "simple")))
+(test #f (regexp? "it\\s[s]e+ms\\s(reg)?exp"))
+(test-values '(("abcd") ("b")) (regexp-match (regexp "a(b)cd") "abdacabcd"))
+(test '("a" "b" "c" "d") (regexp-split (regexp ",") "a,b,c,d"))
+(test '("a" "b" "c" "d") (regexp-split (regexp "\.+") "a.b....c.....d"))
+(test "newline tab spase " (regexp-replace (regexp "\\s") " " "newline
+tab	space "))
diff --git a/contrib/20.for/CMakeLists.txt b/contrib/20.for/CMakeLists.txt
index ebe66a42..9b0f64f0 100644
--- a/contrib/20.for/CMakeLists.txt
+++ b/contrib/20.for/CMakeLists.txt
@@ -1,2 +1,2 @@
-file(GLOB FOR_FILES ${PROJECT_SOURCE_DIR}/contrib/20.for/piclib/*.scm)
+file(GLOB FOR_FILES ${PICRIN_CONTRIB_DIR}/20.for/piclib/*.scm)
 list(APPEND PICLIB_CONTRIB_LIBS ${FOR_FILES})
diff --git a/contrib/CMakeLists.txt b/contrib/CMakeLists.txt
index 11050d90..50c586de 100644
--- a/contrib/CMakeLists.txt
+++ b/contrib/CMakeLists.txt
@@ -1,4 +1,5 @@
-file(GLOB CONTRIBS ${PROJECT_SOURCE_DIR}/contrib/*/CMakeLists.txt)
+set(PICRIN_CONTRIB_DIR ${PROJECT_SOURCE_DIR}/contrib)
+file(GLOB CONTRIBS ${PICRIN_CONTRIB_DIR}/*/CMakeLists.txt)
 list(SORT CONTRIBS)
 foreach(contrib ${CONTRIBS})
   include(${contrib})