The invention provides a magnetic treatment device, which is light and easy to be installed or uninstalled. The magnetic treatment device can exert no pressure on the installation part, and can be installed when matching the installation part. The invention relates to a magnetic treatment apparatus (1), which has a shape changeable along a prescribed part of the body and can perform shape holding when the shape is being changed. The magnetic treatment device (1) includes: a first rubber like elastomer (10) having a slender shape； a core material (20) for shape holding, which is arranged along a length direction of the first rubber like elastomer (10) and is mainly made of a synthetic resin with a higher shape holding capacity than polycarbonate； and a magnetic material (30) included in the first rubber like elastomer (10) to bring the body magnetic force.本發明提供一種裝卸容易並且輕型，另外不會對安裝部位施加壓迫感，能在與該安裝部位匹配的狀態下進行安裝的磁性治療器具。本發明涉及磁性治療器具（1），能使該磁性治療器具（1）的形狀以沿著身體的規定部位的方式進行變化，並且能在改變了該形狀時進行形狀保持，該磁性治療器具（1）包括：細長形狀的第一橡膠狀彈性體（10）；形狀保持用的芯材（20），其沿第一橡膠狀彈性體（10）的長度方向配置，主要由比聚碳酸酯具有更高的形狀保持能力的合成樹脂形成；以及磁性材料（30），其包含在第一橡膠狀彈性體（10）中，以帶給身體磁力。
