A touch sensor is a capacitive touch sensor including a touch detection area that includes a plurality of drive electrodes and a plurality of detection electrodes, and includes a plurality of drive signal lines extending in the Y-axis direction and arranged in the X-axis direction, and a plurality of detection signal lines extending in the X-axis direction and arranged in the Y-axis direction. The touch detection area includes a fingerprint detection area F in which an interval between a plurality of drive signal lines and an interval between a plurality of detection signal lines are narrow, and the detection signal lines include fingerprint authentication signal lines disposed in a fingerprint authentication area and detection signal lines disposed to be electrically separated from the fingerprint authentication signal lines in an area, which is adjacent to the fingerprint authentication area in the X-axis direction, of the touch detection area.