PROBLEM TO BE SOLVED: To provide a posture holder having reduced weight, while having a function of holding a posture of a seating person in a correct state.SOLUTION: The posture holder includes: a buttock support part 11 that has a surface 14 curved along the buttocks 41 of a seating person 40 and supports the buttocks 41 and a lumbar support part 13 that has a horizontal dimension equivalent to the horizontal dimension of a pair of iliac bones 44 of the seating person 40 and smaller than the horizontal dimension of the buttock support part 11, has a curved surface 14 such that both-side edges are located at a front side with respect to a central part in the horizontal direction, and supports the lumbar part 43 of the seating person 40.SELECTED DRAWING: Figure 10COPYRIGHT: (C)2017,JPO&INPIT【課題】着座者の姿勢を正しい状態に保持する機能を備えたまま軽量化することが可能な姿勢保持具を提供する。【解決手段】着座者40の臀部41に沿うように湾曲した表面14を有して前記臀部41を支持する臀部支持部11と、左右方向の寸法が前記着座者40の一対の腸骨44の左右方向の寸法と同等であって前記臀部支持部11の左右方向の寸法よりも小さい寸法とされ、前記左右方向における中央部よりも両側縁部が表側に位置するように湾曲した表面14を有して前記着座者40の腰部43を支持する腰部支持部13と、を備えている。【選択図】図10
