PROBLEM TO BE SOLVED: To provide a posture correction device capable of preventing the onset of shoulder stiffness.SOLUTION: A posture correction device 1 includes a protrusion 2, a backrest part 32, and a seat surface part 33. The protrusion 2 is arranged on the backrest part 32. A protruding end is brought into contact with a sitter 4 depending on a change of a posture of the sitter 4 sitting on the seat surface part 33.COPYRIGHT: (C)2015,JPO&INPIT【課題】肩こりの発症を防止しうる姿勢矯正装置を提供する。【解決手段】突起部2と、背もたれ部32と、座面部33とを含む姿勢矯正装置1であって、前記突起部2は、前記背もたれ部32に配置され、前記座面部33に着席する者4の姿勢の変化に応じて前記着席者4に突出端が接触する姿勢矯正装置。【選択図】図1