This embodiment relates to a button module having a sterilization function. The button module according to one aspect comprises: a cover including an opening; a housing being coupled to the cover; a button body disposed inside the housing, including a first body and a second body selectively exposed to the outside through the opening; a rotation shaft for rotating the button body; a printed circuit board disposed at a rear side of the button body, the printed circuit board including a switch and a germicidal lamp irradiating light toward the button body; and an elastic member disposed between the rotation shaft and the first body and between the rotation shaft and the second body.