PURPOSE: To perform and clear indication and be easy to watch and to effect driving with easiness by a method wherein a direction indicator marks the shape of an arrow mark at a yellow flickering part, other part than the arrow mark is formed in a white color, and the size of the arrow mark proportions to the longitudinal size of the direction indicator of both a bicycle and a four-wheel.

CONSTITUTION: In relation to the front, rear, right, and left direction indicators of a vehicle ranging from a bicycle and a scooter for a two-wheeler to a light, an ordinary, and a large passenger for a four-wheel car and ordinary and large trucks, the direction indicator is a direction indicator where longitudinal and lateral arrow marks 3 are formed. The direction indicator the arrow mark 3 is formed at a flickering part in a yellow color 2 and other part than the arrow mark 3 is formed in a white color 1. The size of the arrow mark 3 proportions to the longitudinal sizes of both a bicycle and a four-wheel. When the direction indicator indicates a direction, a signal is inputted to either a rear right or rear left to effect flickering 4. In this case, all the lights of the direction indicators are flickered, a difference between other part in a white 1 than the arrow mark 3 and the arrow mark art in a yellow 2 and the indicator lamp parts of the arrow mark 3 are seen clearly and an effect which any body can understand at a glance is produced.