PROBLEM TO BE SOLVED: To provide a lightweight and inexpensive orthosis by reducing a load on an operated wire and suppressing wear on a shaft portion. SOLUTION: The orthosis has a first belt and a second belt wrapped around the waist of a wearer, and a tightening portion 30 for tightening the waist by bringing the base ends of the first belt and the second belt closer to each other. It has. The tightening portion 30 is a wire 61 in which pulleys 412a to 412g and 512a to 512e arranged at the base ends of the first belt and the second belt and pulleys 412a to 412g and 512a to 512e are alternately hung. And have. The pulleys 412a to 412g and 512a to 512e include a bearing P1 attached to the shaft portions 411c and 511c, and a resin-made disc-shaped bearing frame P2 into which the bearing P1 is fitted. [Selection diagram] FIG. 8【課題】操作されるワイヤへの負荷が軽減でき、軸部への摩耗を抑えつつ、軽量で安価な矯正装具を提供する。【解決手段】矯正装具は、装着者の腰に巻かれる第１ベルトおよび第２ベルトと、第１ベルトと第２ベルトとの基端部同士の間隔を接近させ、腰を締め付ける締め付け部３０とを備えている。締め付け部３０は、第１ベルトと第２ベルトのそれぞれの基端部に並ぶ滑車４１２ａ～４１２ｇ，５１２ａ～５１２ｅと、滑車４１２ａ～４１２ｇ，５１２ａ～５１２ｅの間を交互に順次掛け回されたワイヤ６１とを備えている。そして、滑車４１２ａ～４１２ｇ，５１２ａ～５１２ｅは、軸部４１１ｃ，５１１ｃに取り付けられるベアリングＰ１と、ベアリングＰ１が嵌め込まれる樹脂製で円盤状のベアリング枠Ｐ２とを備えている。【選択図】図８
