To provide a knife to be disassembled having a cap attached detachably to a tongue part integrally extending from a blade part without necessity to form a screw or a through-hole on the tongue part .

The knife 1 for diving to be disassembled comprises a knife body 2 with the blade part 5 and the tongue part 6, a handle member 3, and the bag-shaped end cap 4 detachably attached to an extension part 8 of the tongue part projecting from a rear end 3b through a through hole 3c of the handle member. The tongue part 6 has an insertion part 7 and the extension part 8, and a connection member 11 separate from the knife body 2 is attached to the extension part 8 extending backward from the handle member 3. The end cap 4 is attached to the rear end of the tongue part via the connection member 11.