An object of the present invention is to embed a magnet body having a receiving part magnetizable on the back side of a magnet part in a cushion member so as to "ensure use comfort" and "miniaturize magnets while ensuring a predetermined magnetic force". realizable. A cushion member for supporting a user S. The magnet body 10 includes a magnet body 10 in which a magnet section 11 and a receiving section 12 that can be magnetized to the magnet section 11 are disposed on the back side of the magnet section 11, and the magnet body 10 is buried in the cushion member. The magnet body 10 has a locking body 14 connected to the magnet body 10 via a thread-like body 13, and the magnet body 10 is buried from one surface side of the cushion member, and the thread-like body 13 penetrates the cushion member in the thickness direction. The locking body 14 is disposed on the other surface side of the cushion member, and the length L of the thread-like body 13 may be smaller than the thickness T of the cushion member. The chair embedding depths D1 and D2 from the surface of the cushion member to the magnet body 10 may be 0.1 cm or more and 10.0 cm or less, or 0.1 cm or more and 5.0 cm or less.【課題】磁石部に着磁可能な受け部をその裏側に配設した磁石体を、クッション部材に埋没させて、「使い心地の確保」と「所定磁力を確保しての磁石小型化」を実現できる。【解決手段】使用者Ｓを支えるクッション部材である。磁石部１１と、磁石部１１に着磁可能な受け部１２を磁石部１１の裏側に配設した磁石体１０を有し、この磁石体１０は、当該クッション部材に埋没している。磁石体１０に糸状体１３を介して連結された係止体１４を有し、磁石体１０は当該クッション部材の表面一方側から埋没し、糸状体１３は当該クッション部材を厚さ方向に貫通し、係止体１４は当該クッション部材の表面他方側に配設され、当該クッション部材の厚さＴより、糸状体１３の長さＬが小さくても良い。クッション部材の表面から磁石体１０までの椅子埋没深さＤ１、Ｄ２が０．１ｃｍ以上１０．０ｃｍ以下や０．１ｃｍ以上５．０ｃｍ以下であっても良い。
