Abstract: There is disclosed a mobile terminal including a rear case having a back plate and a lateral wall; a front case coupled to a front surface of the rear case to form a predetermined space where components are mounted; a button hole formed in the lateral wall; a retaining projection projected from an inner surface of the button hole in a perpendicular direction with respect to the lateral wall; a side key inserted in the button hole; and a retaining rib extended from an inner or lateral surface of the side key to be fastened to the retaining projection, such that in case the button hole may be provided in the lateral surface of the rear case to insert the side key therein, the retaining projection which is able to be integrally formed with the button hole and the retaining rib which is able to be coupled to the retaining projection stably can be arranged to retain the side key stably in a process of assembling the side key.

Abstract: There is disclosed a mobile terminal including a rear case having a back plate and a lateral wall; a front case coupled to a front surface of the rear case to form a predetermined space where components are mounted; a button hole formed in the lateral wall; a retaining projection projected from an inner surface of the button hole in a perpendicular direction with respect to the lateral wall; a side key inserted in the button hole; and a retaining rib extended from an inner or lateral surface of the side key to be fastened to the retaining projection, such that in case the button hole may be provided in the lateral surface of the rear case to insert the side key therein, the retaining projection which is able to be integrally formed with the button hole and the retaining rib which is able to be coupled to the retaining projection stably can be arranged to retain the side key stably in a process of assembling the side key.