SEATBELT DEVICE

A seatbelt device includes a webbing; a tongue; a buckle, in buckled up the webbing, a portion of the webbing configures a lap webbing; a lower restraint member a portion thereof disposed inside a vehicle seat cushion, the lower restraint member, together with the lap webbing, forming a loop opening along a seat front-rear direction, a length direction one side of the lower restraint member being pulled so as to tighten the loop, and the lower restraint member configured to press the body of the occupant from a seat lower side; and a tensioning device actuated in a case of a front-on collision or in a case in which a front-on collision is predicted, the tensioning device pulling the length direction one side of the lower restraint member to tighten the loop, and the tensioning device pulling the lap webbing so as to move toward a seat lower front side.