To stabilize travelling by utilizing air resistance, pressurizing a vehicle body downward in accordance with its speed and reducing the speed loss of a travelling plastic model vehicle by attaching a front aerocowl consisting of wind receiving parts and bumper fitting parts in the front bumper of the travelling plastic model vehicle.

A driving motor is attached to a main body part consisting of a body 3 and chassis 4, two front wheels 16 and two rear wheels 17 are arranged in the chassis 4, a front bumper 5 is arranged in the front end part of the chassis 4, a rear bumper 7 is in the rear end part and front rollers 6 and rear rollers 8 are attached to them. The front aerocowl 1 is formed by the wind receiving part 9 with a projected center surface, which consists of three curved surfaces, and the wind receiving parts 10 with a surface recessed on both sides through the use of one planar bent body and its lower part is bent to form the respective bumper fitting parts 11 and 12. Then the center bumper fitting part 12 is bent to the inner side of the center wind receiving part 9 and the both side bumper fitting parts 11 are bent to the outer side of both wind receiving parts 10.