To let a driver clearly recognize the steered angles of each of front and rear wheels for a four-wheel steering vehicle as the driver is seated at his/her seat.

Sensors detecting the tire steered angles of each of front and rear wheels for a four-wheel steering vehicle, are arranged. The tire steered angles of the front and rear wheels are indicated over a liquid cristal display screen 1. The typical Fig. F1 of a vehicle plane profile and the tires 7a and 7b of the front and rear wheels are indicated over the screen 1. The indicated angle of each tire 7a and 7b is indicated based on signals from the sensors in such a way as to correspond to the actual steered angle. Each steered angle is indicated at the side of the tires 7a and 7b in a digital form.