Patent ID: 8662537

Claim:
A seat belt device comprising: a webbing having a longitudinal direction intermediate portion; and a tongue having a through-hole disposed therein, the longitudinal direction intermediate portion passing through the through-hole, and the tongue being movable in a longitudinal direction, wherein in an applied state to a body of a passenger, the webbing defines a lap webbing that restrains a waist portion of the passenger and a shoulder webbing that restrains a chest portion and a shoulder portion of the passenger, the lap webbing being disposed in a first longitudinal direction from the through-hole, and the shoulder webbing being disposed in a second longitudinal direction from the through-hole, the seat belt device further comprising a dilatant characteristic portion that includes a material having a dilatant characteristic of hardening due to a load of a predetermined magnitude or greater, and that is provided at a region of the webbing that includes a portion of the webbing that is positioned inside the through-hole in the applied state.