To reduce the number of parts in assembly of a trigger button in a controller for games, reduce the material cost, and heighten assembly efficiency.In a controller for games in which trigger buttons are partially protruded outward from opening portions formed in a case, and the trigger buttons are energized by springs and provided slidably by guide of trigger guides, left and right fitting grooves extending up and down are provided on left and right sides of back end surfaces of the trigger guides; ribs for holding the lower end portions of the trigger guides are provided for the case; left and right standing portions are provided on the outsides of the ribs thereby to hold the lower ends of the trigger guides by the ribs; and the left and right standing portions are fitted into the left and right fitting grooves thereby to hold the trigger guides.