A coaxial two-wheel vehicle on which a rider stably travels without the upper body being swayed left and right in a riding state of the center of gravity being positioned high is provided.The coaxial two-wheel vehicle includes: a step plate for a driver to ride; a vehicle body that supports the step plate so as to be capable of changing a posture in a roll direction of rotating around a roll axis as the center, when a traveling direction is made the roll axis; a pair of wheels disposed on both sides on the same axis in the direction orthogonal to the traveling direction of the vehicle body and rotatably supported by the vehicle body; a pair of wheel drive means to drive and rotate the pair of wheels independently; and a handle for directly changing a posture of the step plate or indirectly changing the posture through the vehicle body.