Patent ID: 8292323

Claim:
A knee airbag device for a vehicle, comprising: a gas generator that operates to generate gas; a knee airbag that is accommodated in a folded state and is disposed at a height of knees of an occupant in a sitting state, and that deploys by inflating toward the knees of the occupant with gas supplied from the gas generator; an upper tether and a lower tether that span between an occupant side base fabric portion and a counter-occupant side base fabric portion of an interior of the knee airbag, and that are disposed along a vehicle width direction at up-down positions sandwiching a gas inflow portion at which the gas from the gas generator inflows; and a gas through-flow control portion that is provided at the upper tether and the lower tether; wherein the gas through-flow control portion comprising: gas through-flow opening portions that are provided at positions offset in the vehicle width direction relative to upper shin portions of the occupant in a vehicle front view, and upper shin entry allowance portions that are provided at positions coinciding with the upper shin portions in the vehicle front view and that are constituted as small opening portions whose opening area are specified to be smaller than the gas through-flow opening portions, and a pitch of the adjacent upper shin entry allowance portions of the upper tether is specified to be larger than a pitch of the adjacent upper shin entry allowance portions of the lower tether.