To facilitate positioning (pulling up a wheelchair alongside) when the wheelchair is fixably/releasably connected to stationary installation along which the wheelchair is pulled up, and improve safety by preventing displacement of the wheelchair.SOLUTION: A wheelchair 2c includes upper/lower two-staged first cylinders 13 extending in the longitudinal direction, attached to leg parts 11 and 12 thereof, while a connecting board 8 provided at a bathtub 4 side and composed of a rigid member includes a pair of front/rear two upper/lower-staged second cylinders 82 and 83. The wheelchair 2c is pulled over as shown by a referential mark B1, the first cylinders 13 are fitted between the second cylinders 82 and 83, and a lock pin 84 is penetrated therethrough as shown in a referential mark B2, thereby implementing the coupling. Accordingly, this configuration can facilitate positioning, and prevent vertical displacement of the first cylinders 13 in particular, namely, when the body weight is applied to one side of the wheelchair 2c, preventing the wheelchair from falling sideways.SELECTED DRAWING: Figure 9
