The invention relates to a multifunctional stair lift chair, in particular to a lift chair which is set at the side of the stair and is lifted and lowered by a rail device for people with mobility difficulties to ride, and can directly carry wheelchairs or carry articles through a transport platform below.It is mainly composed of seat group and transport platform.The seat group is provided with a cushion, armrest and back plate; the transport platform is arranged under the back plate of the seat group, and two sides of the platform are provided with side plates which can be connected with the armrest, so that the wheelchair can easily get on and off the platform.The rail device arranged on the side of the stair handrail enables the lift chair to rise and fall along the stair, which is not only for the people with inconvenient movement, but also for transporting wheelchair or articles, and the transport platform is able to fold up, which is practical and convenient.本創作係有關於一種多功能之樓梯升降椅,特別是指一種設置於樓梯側邊,藉由軌道裝置進行升降之升降椅,以供行動不便者乘坐,並藉由下方的運送平台可直接運載輪椅,或用於載送物品。其主要係由座椅組、運送平台所組成。該座椅組設有椅墊、扶手、背板;運送平台係設於座椅組之背板下方,其兩側設有可與扶手連動之側板,可使輪椅方便上下平台。藉由樓梯扶手側邊設置的軌道裝置,使升降椅能沿著樓梯進行升降,不僅供行動不便者乘坐,更能運送輪椅或物品,且該運送平台係能向上翻摺收納,不佔空間相當實用且便利。