To provide a posture fixing mat in which cushioning properties are extremely too soft and are not too hard, a human body can be followed so as to make a wall with a matt surface, and thereby conditions of a posture can be maintained easily.SOLUTION: A posture fixing mat includes: a lower part having multiple gas-permeable slender bag-like fabric bodes continuously arranged along the width direction and having many beads filled inside, and an exterior part for storing the slender bag-like fabric bodies and comprising a coating material to coat them in an airtight state； an upper layer part continuously arranged at an upper part in the lower part and arranged in response to each slender bag-like fabric body, and including multiple soft bodies covered by the skin material； and a valve part provided at the exterior part, and removably mounted with a negative pressure generator for absorbing air in the exterior part.SELECTED DRAWING: Figure 2【課題】クッション性が極端に柔らか過ぎたり固過ぎたりせず、人体にマット表面で壁を作るように倣わせることができ、体位の状態を容易に維持することができる体位固定マットを提供すること。【解決手段】 幅方向に沿って複数連設され、内部に多数のビーズが充填された気体透過性の細長袋状生地体及び前記細長袋状生地体を収納して気密状態に被覆する被覆材からなる外装部を有する下層部と、前記下層部上方に連設されて前記各細長袋状生地体に対応して配置され、表皮材に覆われた複数の軟質体を備えた上層部と、前記外装部に設けられて、前記外装部内部の空気を吸引する陰圧発生器具が着脱可能に装着される弁部とを備える。【選択図】図２
