To provide a riding assistance device for a wheelchair which is simple in construction, easy to install and detach from a wheelchair, and can be used as a life-saving device which can be used as a life-saving device in case of a disaster.SOLUTION: A wheelchair boarding and lowering assisting device 10 for assisting a wheelchair user getting on and off a wheelchair 11 is disposed so as to cover the backrest 32 from a seat 28 of the wheelchair 11 and is compressed by a compressed gas from a front position of the seat 28 A seat chair mat 40 which inflates to the upper position of the backrest 32, a compressed gas supply means 41 which supplies compressed gas to the seat chair mat 40, a control means 42 which performs on / off control, a base portion is attached to both upper sides of the seat mat mat 40 51 for supplying and discharging the compressed gas, the seat chair mat 40 is removed from the wheelchair 11, and the tip portions of the first and second hoses 48, 51 are seated By connecting to the lower part of both sides of the child mat 40 and putting it on both shoulders of life preserver users, it can be used as a life preserver.BACKGROUND OF THE INVENTION【課題】構成が簡単で、車椅子に対する取付け取外しを容易にでき、災害時には救命具としても使用できる救命具に使用可能な車椅子用乗降補助装置を提供する。【解決手段】車椅子利用者が車椅子11に乗り降りするのを補助する車椅子用乗降補助装置10であって、車椅子11の座席28から背もたれ32を覆って配置され、圧縮気体によって座席28の前側位置から背もたれ32の上部位置にかけて膨らむ座椅子マット40と、これに圧縮気体を供給する圧縮気体供給手段41と、このオンオフを行う制御手段42と、座椅子マット40の両側上部に基部が取付けられ圧縮気体の供給と排出を行う第1、第2のホース48、51を有し、座椅子マット40を車椅子11から取外して、第1、第2のホース48、51の先部を座椅子マット40の両側下部に接続し救命具利用者の両肩にかけることで、救命具としても利用できる。【選択図】図1
