Knee airbag device for vehicle

A knee airbag device for a vehicle, comprising:

• a gas generation portion that is disposed in a vehicle, and that is operated to generate gas;
• a knee airbag that is stored in a folded state at a predetermined position above knees of an occupant in the vehicle, wherein when the knee airbag receives the gas, the knee airbag is inflated and deployed toward an area below a steering column so that the knee airbag is disposed between knees of an occupant and a lower portion of an instrument panel;
• a peripheral seam portion located on an inside of the knee airbag;
• and
• a thickness regulation member that is provided on the lower end portion in the knee airbag and on the peripheral seam portion at a position in a contact portion that contacts each of the knees of the occupant, and that regulates a thickness of the knee airbag such that the thickness of the knee airbag at the position in the contact portion is smaller than the thickness of the knee airbag at a portion other than the contact portion.