To provide an electronic device which is compact and excellent in easiness to hold a housing and operability of buttons.

An electronic device comprises: a grip part used for putting a finger when holding a housing; a key top unit 20A having a moving image button 22 which is exposed from an opening provided adjacent to the grip part to the outside of the housing; a boss 23 provided at the side of the inside of the housing of the moving image button; a metal dome provided at a position facing the boss; and an operation board to which the metal dome is provided. The key top unit is provided at the side of inside of the housing and comprises: a stopper 25 arranged at nearer side of the grip part than the boss; and support parts 28 for supporting the moving image button so that rigidity of the grip part side is higher than that of the side opposite to the grip part. When the moving image button is pushed down, the stopper abuts on the operation board prior to inputting of the metal dome by the boss.