Seat belt apparatus

In order to manufacture a kinetic energy absorbing member of simple shape at low cost which absorbs the kinetic energy of a pull-in member such as a buckle or a lap anchor when reaching the bottom, the kinetic-energy absorbing member (15) is composed of a thin-walled oval tubular member which is made of metal such as iron or aluminum. The kinetic-energy absorbing member (15) is arranged between a bracket and buckle such that the axial direction of the kinetic-energy absorbing member is equal to the pulling direction of the buckle. A wire (5) forms a U-turn about a pulley (6) of the buckle (4) so as to have two wire portions (5a, 5b) which extend through the inside of the tubular kinetic-energy absorbing member (15). As the pretensioner is actuated, the buckle is pulled with the wire (5) so as to depress the kinetic-energy absorbing member (15) with the bracket so that the kinetic-energy absorbing member (15) collapses, thereby absorbing the kinetic energy of the buckle when reaching the bottom.