A key module includes a first bracket, a second bracket coupled to the first bracket to form an internal space and including an opening region, and a sensor bracket allowing a fingerprint sensor unit and a press key unit to be mounted therein, and mounted to be movable in the internal space such that one region of the fingerprint sensor unit is exposed through the opening region, wherein one surface of the fingerprint sensor unit is exposed, the press key unit is disposed on the other surface of the fingerprint sensor unit, and the press key unit includes a circuit board and a dome switch disposed on the circuit board to face the first bracket.
