To carry out fastening and calking work at the same time.

A lock bolt fastening and calking tool includes: a fastening portion 2 having, at a tip thereof, a fitting protrusion 2a fitting in a fitting recess 11c provided in an end surface of a head 11a of a bolt 11; a calking portion 3 provided, on an inner wall surface 3b of a housing 3a where the head 11a of the bolt 11 and a lock member 12 can be fetched in, with protrusions 3c for pressing a part of the lock member 12 into the periphery of the head 11a of the bolt 11 as the bolt 11 moves in a fastening direction; and a body 4 in which the fitting protrusion 2a of the tip of the fastening portion 2 is disposed in the housing 3a of the calking portion 3, and the calking portion 2 is movable along the center axis C4 such that the tip of the fitting protrusion 2a goes in and out of the housing while restricting the rotation of the fastening portion 2 around the center axis C4 in the fastening direction of the bolt 11.