Provided is a waist belt (1) in which: a left inner tightening belt (43) is extended from a left main belt (2) and folded back through a left folding-back ring (33) of a right main belt (3) a right inner tightening belt (53) is extended from the right main belt (3) and folded back through a right folding-back ring (23) of the left main belt (2) a left subsidiary tightening belt (6) is extended leftwards from the right main belt (3) a right subsidiary tightening belt (7) is extended rightwards from the left main belt (2) a left outer tightening belt (44) is connected with the left subsidiary tightening belt (6), folded back through a left fixation ring (45) detachably attached to the left main belt (2), folded back through a left linking ring (433) of the left inner tightening belt (43), and connected with the left main belt (2) and a right outer tightening belt (54) is connected with the right subsidiary tightening belt (7), folded back through a right fixation ring (55) detachably attached to the right main belt (3), folded back through a right linking ring (533) of the right inner tightening belt (53), and connected with the right main belt (3). Circumferential differences at the waist portion of a user are absorbed, with the result that the function of tightening the waist portion is not impaired even when the user moves.La présente invention concerne une sangle de taille (1) caractérisée par les éléments suivants : une sangle de serrage interne gauche (43) est étendue depuis une sangle principale gauche (2) et repliée à travers un anneau de pliage arrière gauche (33) dune sangle principale droite (3) une sangle de serrage interne droite (53) est étendue depuis la sangle principale droite (3) et repliée à travers un anneau de pliage arrière droit (23) de la sangle principale gauche (2) une sangle de serrage auxiliaire gauche (6) est étendue vers la gauche depuis la sangle principale droite (3) une sangle de serrage auxiliaire droite (7) est étendue vers la dro
