To provide an adhesion confirmation device excellent in certainty and reliability, which confirms adhesion of a work and a working pallet while securing versatility of the working pallet.

A tool 11 is provided with: a seating face 14 for placing the working pallet 50; a work contact face 16 preset at a position of a contacting surface of an under surface Wa of the work W placed and supported on the working pallet 50 placed on the seating face 14; a first air passage 18, one end of which is opened through the seated face 14; a second air passage 19, one of which is opened through the work abutting face 16; and first and second air catching sensors 25, 26 detecting an air flow in the first air passage 18 and the second air passage 19. When the first and second air catching sensors 25, 26 detect no air flow in the first air passage 18 and the second air passage 19, it is determined that the work W is closely contacted with a work seating face 53 of the working pallet 50.