PROBLEM TO BE SOLVED: To provide an immobilizing device mounted on a wearer by him/herself without the help of a care giver, immobilizing a shoulder joint, arm, or elbow at a predetermined position, and having a reduced load on his/her neck or shoulder in prevention or treatment of a broken arm or shoulder, injured arm or shoulder, shoulder subluxation, arm or shoulder rotator cuff injury, shoulder joint subluxation, or the like.SOLUTION: The immobilizing device includes: a cloth material 1 of substantially triangular shape, a connector 3 fixed at one end of an oblique line of the cloth material 1, a strap member 2 for connecting the connector 3 and the cloth material 1, and a hook tape of a hook-and-loop fastener 4 which is fixed to one end of the top point of the other side of the cloth material 1.COPYRIGHT: (C)2013,JPO&INPIT【課題】腕や肩の骨折、腕や肩のケガ、肩の亜脱臼、腕肩腱板損傷、肩関節亜脱臼予防などの予防や治療において、肩関節や腕、肘を所定の位置に介護者の力を借りることなく、着用者自身で装着して固定できるとともに、首や肩への負担も少ない固定用具を提供する。【解決手段】ほぼ三角形状の布材1と、この布材1の斜辺の一端に固着された連結具3と、この連結具3と上記布材1とを連結するベルト部材2と、上記布材1の他辺の頂点の一端に固着された雄型の面ファスナー4とを備える。【選択図】図2