A knee bolster structure includes an upper shock-absorbing member adapted for absorbing input force of knees of an occupant who has an average physical constitution and a lower shock-absorbing member adapted for absorbing input force of knees of an occupant who is small in stature, and a difference in strength between the upper shock-absorbing member and the lower shock-absorbing member is provided such that receiving strength of the upper shock-absorbing member is larger and receiving strength of the lower shock-absorbing member is smaller.