diff --git a/Database/Sql/Simple/PostgreSQL.hs b/Database/Sql/Simple/PostgreSQL.hs
new file mode 100644
--- /dev/null
+++ b/Database/Sql/Simple/PostgreSQL.hs
@@ -0,0 +1,82 @@
+{-# LANGUAGE TypeOperators #-}
+{-# LANGUAGE DataKinds #-}
+{-# LANGUAGE TypeFamilies #-}
+{-# LANGUAGE DeriveDataTypeable #-}
+{-# LANGUAGE FlexibleInstances #-}
+
+module Database.Sql.Simple.PostgreSQL
+    ( PostgreSQL
+    , ConnectInfo(..)
+    , postgreSQL
+    , psql
+    , module Data.Default.Class
+    ) where
+
+import Control.Applicative
+import Control.Monad
+import qualified Data.Text.Encoding as T
+import Data.Typeable
+import Data.Proxy
+import Data.Word
+import Database.Sql.Simple.Internal
+import qualified Database.PostgreSQL.Simple as PSql
+import qualified Database.PostgreSQL.Simple.ToRow as PSql
+import qualified Database.PostgreSQL.Simple.FromRow as PSql
+import qualified Database.PostgreSQL.Simple.ToField as PSql
+import qualified Database.PostgreSQL.Simple.FromField as PSql
+import qualified Database.PostgreSQL.Simple.Types as PSql
+import Data.Default.Class
+
+data PostgreSQL = PostgreSQL PSql.Connection
+    deriving Typeable
+
+instance PSql.ToField a => PSql.ToRow (Only a) where
+    toRow (Only v) = PSql.toRow $ PSql.Only v
+
+instance PSql.FromField a => PSql.FromRow (Only a) where
+    fromRow = Only . PSql.fromOnly <$> PSql.fromRow
+
+instance (PSql.ToRow a, PSql.ToRow b) => PSql.ToRow (a :. b) where
+    toRow (a :. b) = PSql.toRow $ a PSql.:. b
+
+instance (PSql.FromRow a, PSql.FromRow b) => PSql.FromRow (a :. b) where
+    fromRow = (\(a PSql.:. b) -> a :. b) <$> PSql.fromRow
+
+instance Backend PostgreSQL where
+    data ConnectInfo PostgreSQL = ConnectInfo
+        { connectHost     :: String
+        , connectPort     :: Word16
+        , connectUser     :: String
+        , connectPassword :: String
+        , connectDatabase :: String
+        } deriving (Eq, Read, Show)
+    type ToRow   PostgreSQL = PSql.ToRow
+    type FromRow PostgreSQL = PSql.FromRow
+
+    connect (ConnectInfo h p u w d) =
+        PostgreSQL <$> PSql.connect (PSql.ConnectInfo h p u w d)
+    close   (PostgreSQL      c) = PSql.close c
+
+    execute  (PostgreSQL c) t q = void . Sql $ PSql.execute  c (psqlQuery t) q
+    execute_ (PostgreSQL c) t   = void . Sql $ PSql.execute_ c (psqlQuery t)
+
+    query    (PostgreSQL c) t q = Sql $ PSql.query  c (psqlQuery t) q
+    query_   (PostgreSQL c) t   = Sql $ PSql.query_ c (psqlQuery t)
+
+    begin    (PostgreSQL c) = Sql $ PSql.begin c
+    commit   (PostgreSQL c) = Sql $ PSql.commit c
+    rollback (PostgreSQL c) = Sql $ PSql.rollback c
+
+instance Default (ConnectInfo PostgreSQL) where
+    def = ConnectInfo h p u w d
+      where
+        PSql.ConnectInfo h p u w d = PSql.defaultConnectInfo
+
+psqlQuery :: Query -> PSql.Query
+psqlQuery = PSql.Query . T.encodeUtf8 . getQuery (typeOf (undefined :: PostgreSQL))
+
+postgreSQL :: Proxy '[PostgreSQL]
+postgreSQL = Proxy
+
+psql :: Proxy '[PostgreSQL]
+psql = postgreSQL
diff --git a/LICENSE b/LICENSE
new file mode 100644
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,20 @@
+Copyright (c) 2014 Hirotomo Moriwaki
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/Setup.hs b/Setup.hs
new file mode 100644
--- /dev/null
+++ b/Setup.hs
@@ -0,0 +1,2 @@
+import Distribution.Simple
+main = defaultMain
diff --git a/sql-simple-postgresql.cabal b/sql-simple-postgresql.cabal
new file mode 100644
--- /dev/null
+++ b/sql-simple-postgresql.cabal
@@ -0,0 +1,28 @@
+name:                sql-simple-postgresql
+version:             0.1.0.0
+synopsis:            postgresql backend for sql-simple
+-- description:         
+license:             MIT
+license-file:        LICENSE
+author:              HirotomoMoriwaki<philopon.dependence@gmail.com>
+maintainer:          HirotomoMoriwaki<philopon.dependence@gmail.com>
+Homepage:            https://github.com/philopon/apiary
+Bug-reports:         https://github.com/philopon/apiary/issues
+copyright:           (c) 2014 Hirotomo Moriwaki
+category:            Database
+build-type:          Simple
+cabal-version:       >=1.10
+
+library
+  exposed-modules:     Database.Sql.Simple.PostgreSQL
+  build-depends:       base                 >=4.6 && <4.8
+                     , text                 >=1.1 && <1.2
+                     , sql-simple           >=0.1 && <0.2
+                     , postgresql-simple    >=0.4 && <0.5
+                     , data-default-class   >=0.0 && <0.1
+
+  if impl(ghc < 7.8)
+    build-depends:     tagged               >=0.7 && <0.8
+
+  ghc-options:         -Wall -O2
+  default-language:    Haskell2010