There is provided a printing apparatus including: a head unit including two first heads and a second head; a support unit arranged to face the head unit and has a support surface; and a sensor arranged between a first virtual line extending in a conveyance direction so as to pass an end of a nozzle group area, of one of the two first heads, defined on a side of other of the two first heads and a second virtual line extending in the conveyance direction so as to pass an end of a nozzle group area, of the other of the two heads, defined on a side of the one of the two first heads, and arranged, in the conveyance direction, upstream of a nozzle group of the second head, the sensor including a projecting member which projects toward the supporting surface with respect to a nozzle surface.