INDWELLING DEVICE

The indwelling device (10) includes a main body (14), a main-body-side attaching sheet (42), and a plate-shaped intermediate member (50) that is configured to be elastically deformable and is stacked between the main body (14) and the main-body-side attaching sheet (42). The intermediate member (50) includes a base (52), and a central piece (56) and an arm piece (58) extending in parallel from the base (52). The intermediate member (50) is fixed to the main-body-side attaching sheet (42) from the base (52) to the central piece (56), and is fixed to the main body (14) from the base (52) to the arm piece (58). The central piece (56) is not fixed to the main body (14), and the arm piece (58) is not fixed to the attaching member. 本发明提供能够稳定地留置于生物体的体表的留置器具。留置器具(10)具有：主体(14)；主体侧粘贴片(42)；和能够弹性变形地构成且层叠于主体(14)与主体侧粘贴片(42)之间的板状的中间部件(50)。中间部件(50)具有基部(52)、和从基部(52)彼此并排延伸的中央片(56)以及臂片(58)。中间部件(50)从基部(52)至中央片(56)的范围内与主体侧粘贴片(42)粘合，从基部(52)至臂片(58)的范围内与主体(14)粘合。另外，中央片(56)没有与主体(14)粘合，臂片(58)没有与粘贴部件粘合。