A user interface device includes: a proximity sensor configured to detect proximity of a user; an electrostatic switch configured to detect capacitance changes of a plurality of electrodes; an acceleration sensor configured to detect an acceleration; and a microcomputer configured to control supply of electric current to the electrostatic switch and the acceleration sensor based on a detection result of the proximity sensor, and recognize a plurality of user operations based on detection results of the electrostatic switch and the acceleration sensor.