A game controller is provided. The game controller includes a first handle body. The first handle body includes a first control module, a first operation interface, a first connection portion and a second connection portion. The first connection portion is a male connector. The first handle body is connected to a mobile device through the first connection portion. The second connection portion is a female connector. The first handle body is connected to a second handle body through the second connection portion and a signal transmission wire. A first terminal and a second terminal of the signal transmission wire each includes a male connector.