To provide a popular man-powered vehicle being lightweight, compact and pollution-free and allowing safe everyday use or recreational use.

This vehicle comprises: a large wheel 1 serving as the main wheel driven by means of leg-operated pedals 4; a rotating shaft 9 for changing the advancing direction of the large wheel; a saddle 5 and a frame 2 attached to the rotating shaft 9; a small wheel 3 attached to an adjuster 8 at the lower end of the frame and behind the large wheel so that the small wheel 3 is vertically adjustable relative to the frame and rotatable 360 degrees to keep both wheels stable at the front and rear; and brakes, a handle 6, a light 7, a bell and the like attached to the vehicle.