To provide a steering wheel device for a vehicle capable of ensuring a good operability by inhibiting an unintentional slide of this steering knob as low as possible when a steering wheel is rotated/operated by clamping the steering knob attached to a peripheral edge part of this steering wheel.

The steering device for a vehicle is provided with the steering wheel 10 rotatably mounted to the vehicle; and the steering knob 15 rotatably attached to a front surface part of this steering wheel 10. It is characterized in that a slide-stop treatment 16 is applied to at least lower half part of the steering knob 15.