An electronic device includes a body, a door, and a connection module. The body has an opening located at a side of the body. The door is pivoted to the body and capable of rotating between an opening position and a closing position in relative to the body for exposing or covering the opening. The connection module is slidably connected to the body. When the door is rotated to the opening position in relative to the body and exposes the opening, the door drives the connection module to slide to a working position in relative to the body, and when the door is rotated to the closing position in relative to the body and covers the opening, the door drives the connection module to slide to a retracted position in relative to the body.