To provide a toy automobile which travels on a straight course as quickly as possible, reduce the speed as less as possible even in a sharp curve, and is prevented from being run out from a guard rail.

Guide wheels are so constituted that the first and second guide rollers 2, 3 are projected in both front ends of a vehicle body 1 and a guide roller 4 is projected in the rear both ends, and when the vehicle body 1 travels along a straight wall face W, it travels with its first guide roller 2 only being in contact with the wall surface. When it approaches to a position where the wall surface W is curved, the first guide roller 2 receives the contact pressure from the wall surface W, a swing arm having the first and second guide rollers attached thereto is swung against the spring force so that the both guide rollers 2, 3 and the guide roller 4 in the rear end simultaneously travel in such a state as being contact with the wall surface W.