A holder is provided for holding an electronic device on a supporting surface. The holder includes a main body, an attaching member, and a connection arm. The main body includes a support member for supporting the electronic device and a restricting mechanism movably connected to the support member for stably keeping the electronic device in the support member. The attaching member is used for attaching the main body to the supporting surface. Two opposite ends of the connection arm are respectively rotatably coupled to the attaching member and the main body to allow the viewing angle of the electronic device being adjusted.