A tongue comprising: a tongue plate including an engagement portion which is to be engaged with a buckle device and arranged so as to protrude from a substantially central position with reference to a front edge portion of the tongue plate, and an insertion hole which is formed at a substantially central part of the tongue plate so as to allow insertion of a folded portion of a webbing folded back in a longitudinal direction; a housing case in a substantially box form for housing the central part of the tongue plate, the housing case including a through hole which is formed at a position meeting with the insertion hole of the tongue plate so as to allow insertion of the webbing, and a slit hole formed at a front edge portion of the housing case so as to allow insertion of the engagement portion; a stopper bar, with the folded portion of the webbing hung therearound, which is arranged to straddle over the insertion hole of the tongue plate and is allowed to slide back and forth with reference to the tongue plate; and characterized in that an urging unit which urges the stopper bar so as to slide the stopper bar rearward while coming in contact with a pair of front end surfaces on a pair of engagement parts provided at longitudinal ends of the stopper bar, wherein the housing case includes a plurality of ribs which are arranged upright on an inner surface thereof along a front-rear direction so as to press the webbing which is arranged to face the inner surface and hung around the stopper bar, and wherein the plurality of ribs are arranged in parallel to one another in a direction orthogonal to a sliding direction of the stopper bar. a tongue plate including an engagement portion which is to be engaged with a buckle device and arranged so as to protrude from a substantially central position with reference to a front edge portion of the tongue plate, and an insertion hole which is formed at a substantially central part of the tongue plate so as to allow insertion of a folded portion of a webbing folded back in a longitudinal direction; a housing case in a substantially box form for housing the central part of the tongue plate, the housing case including a through hole which is formed at a position meeting with the insertion hole of the tongue plate so as to allow insertion of the webbing, and a slit hole formed at a front edge portion of the housing case so as to allow insertion of the engagement portion; a stopper bar, with the folded portion of the webbing hung therearound, which is arranged to straddle over the insertion hole of the tongue plate and is allowed to slide back and forth with reference to the tongue plate; and characterized in that an urging unit which urges the stopper bar so as to slide the stopper bar rearward while coming in contact with a pair of front end surfaces on a pair of engagement parts provided at longitudinal ends of the stopper bar, wherein the housing case includes a plurality of ribs which are arranged upright on an inner surface thereof along a front-rear direction so as to press the webbing which is arranged to face the inner surface and hung around the stopper bar, and wherein the plurality of ribs are arranged in parallel to one another in a direction orthogonal to a sliding direction of the stopper bar.