diff --git a/src/client.rs b/src/client.rs
new file mode 100644
index 0000000..a532913
--- /dev/null
+++ b/src/client.rs
@@ -0,0 +1,48 @@
+//! Client.
+
+use std::marker::PhantomData;
+
+use hyper;
+
+use provider::Provider;
+
+/// OAuth 2.0 client.
+pub struct Client<P: Provider> {
+    http_client: hyper::Client,
+    client_id: String,
+    client_secret: String,
+    redirect_uri: Option<String>,
+    provider: PhantomData<P>,
+}
+
+impl<P: Provider> Client<P> {
+    /// Creates a client.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use inth_oauth2::client::Client;
+    /// use inth_oauth2::provider::Google;
+    ///
+    /// let client = Client::<Google>::new(
+    ///     Default::default(),
+    ///     "CLIENT_ID",
+    ///     "CLIENT_SECRET",
+    ///     Some("urn:ietf:wg:oauth:2.0:oob")
+    /// );
+    /// ```
+    pub fn new<S>(
+        http_client: hyper::Client,
+        client_id: S,
+        client_secret: S,
+        redirect_uri: Option<S>
+    ) -> Self where S: Into<String> {
+        Client {
+            http_client: http_client,
+            client_id: client_id.into(),
+            client_secret: client_secret.into(),
+            redirect_uri: redirect_uri.map(Into::into),
+            provider: PhantomData,
+        }
+    }
+}
diff --git a/src/lib.rs b/src/lib.rs
index 2d7e474..d487658 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -5,3 +5,4 @@ extern crate url;
 
 pub mod token;
 pub mod provider;
+pub mod client;