Game controller

A game controller which is removably attachable to a main unit having a main unit-side slide member and configured to execute a game process, the game controller comprising:

• an operation section;
• and
• a controller-side slide member protruding from a first surface of the game controller and configured to slidably engage with the main unit-side slide member in a slide direction, wherein:
• the controller-side slide member has a first end and a second end in the slide direction;
• the game controller is configured to be attached to the main unit by inserting the controller-side slide member into the main unit-side slide member from the first end;
• the game controller includes a stop member configured to resist a slide movement, in an opposite direction, of the controller-side slide member against the main unit-side slide member, the opposite direction being a direction opposite to a direction in which the controller-side slide member is inserted into main unit-side slide member;
• and
• the stop member is configured to protrude from a side surface of the controller-side slide member, where the side surface is substantially perpendicular to the first surface, and the stop member is on the second end side of a center of the controller-side slide member in the slide direction.