To provide a mobile vehicle capable of suppressing the inclination angle of the body part to the running surface at a low level in shifting from a two-axle wheels grounded state to an erected state.

When a state in which two-axle wheels 22 and 23 are grounded on the running surface Sd (two-axle wheels grounded state) is transferred to a state in which the vehicle is erected on one-axle wheel 22, the body part 10 of the vehicle is rotated around a support shaft C₂₁ with respect to the support part 21 in the two-axle wheels grounded state; an inertial force around the support shaft C₂₁ is produced by decreasing the rotation speed of the body part 10 with respect to the support part 21; and the support part 21 is rotated around the axle 22a of one-axle wheel 22 grounded on the running surface Sd by the inertial force F to transfer to the state in which the vehicle is erected on the one-axle wheel 22.