PURPOSE: To make the indicating direction of the steering wheel coincide with the actual direction of driving b reducing numbers of teeth of the gear-wheel to half as those of the gear-wheel of the revolving caster and moreover connecting directly the steering gear with the round steering wheel with a direction indicator.

CONSTITUTION: A cycloid motor car is be driven through a belt by a rear-engine 2 and group of gear-wheels is held at the upper surface of the pulley 6 horizontally revolved installed revolving-free at the front of the body 8. Group of gear-wheels is composed of revolving gear-wheels of caster 10, intermediate gear-wheel 11 and the gear-wheel 12 for steering wheel and these are inserted to the main revolving shaft of the driving caster 9 installed at the lower side of the horizontal revolving pulley 6. The gear wheel 12 of the steering wheel has the half number of teeth as those of the revolving gear wheel 10 of the caster and is connected directly to the round steering wheel 15 with a direction-indicator. Then, depending upon coinciding the indicating direction of the steering wheel with the actual driving direction, driving operation is safe and correct.