PROBLEM TO BE SOLVED: To prevent a shift to the front.SOLUTION: A wheelchair includes: a pair of body frames 10 and 10 having a back frame part 20 with an upper end part where a back sheet 2 is attached and a lower end part where a first seat sheet 3 is attached and a main frame part 30 which supports the back frame part 20 and has front wheels 36 attached to the front and rear wheels 34 attached to the back and a seat frame 12 which is provided on the main frame part 30 and to which a second seat sheet 4 is attached. The back frame part 20 is formed to bend backward and to continuously bend forward from the lower end part toward the upper end part in such a manner to follow hips 100b and a back 100a of a human being so that the back frame part is provided to bend in an almost S-shape in a side view.