Recess of the bed-side base of the bed body portion (12) (23) ( 23a) to be a bed of coalescence method of forming a bed (11) for that bed rest is people coalescing the wheelchair (13), while the shape of the wheelchair seat surface portion (31) as a chair shape, tilt operation in, is allowed to attitude change than chair posture to tilt posture tilting the high seat portion than the base portion of the position of the foot location, wheelchair is moved into the recess of the base part, and to change the seat portion to the non-tilt position than tilt attitude .ベッド本体部(12)のベッド側基台部(23)の凹部(23a)に車椅子(13)を合体させて人が臥床するためのベッド(11)を形成するベッドの合体方法であって、車椅子の座面部(31)の形状を椅子形状としたまま、チルト動作で、足置の位置を基台部より高く座面部を傾けたチルト姿勢に椅子姿勢より姿勢変更させ、車椅子を基台部の凹部に移動させ、座面部をチルト姿勢より非チルト姿勢に変更させる。
