PROBLEM TO BE SOLVED: To provide a chair to solve a problem of a conventional stomachache/backache prevention health chair that it acts acupressure beat on the abdominal region by resilient repulsion using springs at the sites, and arms are pressed against an armrest part, a forward bending posture and crossing legs on the seating region take off the freedom of hands and legs and are unstable to lack security and safety.SOLUTION: In the secure reverse-sitting chair, springs are removed from the sites, the shape of an abdominal rest part A is exchanged at one touch by a slide rail according to the situations, to act on positions matched with a body shape. Independent foot rest parts C, D, E are changed by diversified foot changes at positions matched with the length of a foot. Thus the chair has an adjustment mechanism to enable a user to take a standing sitting posture.COPYRIGHT: (C)2012,JPO&INPIT【課題】従来の腹痛・腰痛防止健康椅子において、各当部のスプリング使用で弾力的反発力により、腹部には指圧鼓動を作用させ、肘当部では腕を押え前かがみ姿勢と座部上での足の組替えは、手足の自由を奪い不安定で安心安全に欠ける。【解決手段】各当部からスプリングを取除き、腹当部Aの型状を状況に合わせスライドレールでワンタッチ交換し、体形に合った位置で作動させ、又独立した足当部C、D、Eは足の長さに合った位置で多様な足の組替により、立位座位姿勢がとれる調整機能を備える。【選択図】図1