An example game controller includes a housing main body formed by connecting a housing member on a front surface side and a housing member on a back surface side. On the left and right of the housing main body, holding portions are provided. To the left and right holding portions, a pair of grip portions covering the entirety of the holding portions are connected. A boundary portion between two housing members is covered with a grip portion. Thus, when a user grips the grip portion, the grip portion is likely to fit the hand well. Thus, it is possible to improve the operability.