A small-sized electric vehicle comprising: a main frame; a board that is attached to the main frame; a swing arm, the swing arm including: one end pivotally that is supported by the main frame; and another end at which a pair of rear wheels is pivotally supported; an electric mechanism (14, M) that is capable of making the small-sized electric vehicle alone self-travel; a coupling member (61, 71) that is configured to couple a wheelchair to the small-sized electric vehicle; a mounting member (61, 71) that is configured to mount the wheelchair on the small-sized electric vehicle, as the coupling member (61, 71); and a receiving member (61, 71) that is provided with a recessed part (63, 72) on which a component member (104, 105) of the wheelchair is mounted, as the mounting member (61, 71), characterized by a seat that is mounted on an upper end portion of the main frame, wherein the small-sized electric vehicle is switchable between a first seated driving mode, in which driving while being seated on the seat is enabled and a standing driving mode, in which driving while standing on the board positioned nearly parallel to the running surface along with the seat is enabled, achieved by pivoting the main frame toward the swing arm in the first seated driving mode, when the first seated driving mode is switched to the standing driving mode, the receiving member (61, 71) is erected between the pair of rear wheels and the recessed part (63, 72) is positioned on an upper side of the receiving member (61, 71), and when the component member (104, 105) of the wheelchair is mounted on the recessed part (63, 73) of the receiving member (61, 71), rear wheels of the wheelchair are separated from a running surface. a main frame; a board that is attached to the main frame; a swing arm, the swing arm including: one end pivotally that is supported by the main frame; and another end at which a pair of rear wheels is pivotally supported; one end pivotally that is supported by the main frame; and another end at which a pair of rear wheels is pivotally supported; an electric mechanism (14, M) that is capable of making the small-sized electric vehicle alone self-travel; a coupling member (61, 71) that is configured to couple a wheelchair to the small-sized electric vehicle; a mounting member (61, 71) that is configured to mount the wheelchair on the small-sized electric vehicle, as the coupling member (61, 71); and a receiving member (61, 71) that is provided with a recessed part (63, 72) on which a component member (104, 105) of the wheelchair is mounted, as the mounting member (61, 71), characterized by a seat that is mounted on an upper end portion of the main frame, wherein the small-sized electric vehicle is switchable between a first seated driving mode, in which driving while being seated on the seat is enabled and a standing driving mode, in which driving while standing on the board positioned nearly parallel to the running surface along with the seat is enabled, achieved by pivoting the main frame toward the swing arm in the first seated driving mode, when the first seated driving mode is switched to the standing driving mode, the receiving member (61, 71) is erected between the pair of rear wheels and the recessed part (63, 72) is positioned on an upper side of the receiving member (61, 71), and when the component member (104, 105) of the wheelchair is mounted on the recessed part (63, 73) of the receiving member (61, 71), rear wheels of the wheelchair are separated from a running surface.