To solve such programs that a chair with wheels such as a wheelchair and a baby carrier occupies a very large space and gives large influence to getting on and off and moving in a car of a surrounding passengers, there is a few placing spaces and a few trains where placing spaces are arranged exclusively for the wheelchair or the baby carrier, and it have been very disadvantage to use them, although the chair with wheels is stopped in a vacant space in front of the seat of a train or the space exclusively for the chair with the wheels are used when infants or adults who hardly walk use the chair with wheels in a public transport facility such as the train when going out.

The height of the seat part of the chair with wheels is set in a position higher than the seat of the train and the size and shape of the rear wheels and the frame supporting the same are changed thereby they can be received in the upper and lower spaces of the seat of the train, because the conventional chair with the wheels has a structure in which the height of the seat part has a height equal to the seat of the train or lower and the rear wheels and the frame supporting the same of the chair with the wheels come into contact with the seat of the train.