Structure of rear portion of vehicle furnished with curtain airbag apparatus

A structure of a rear portion of a vehicle furnished with a curtain airbag apparatus includes a rear pillar, a soft roof trim, a rear pillar trim harder than the roof trim, and a cover constituting part of the rear pillar trim and covering a specific area of a front face portion of the rear pillar trim. The curtain airbag apparatus includes a curtain airbag and an inflator for inflating and deploying the curtain airbag into the vehicle interior along side window glass. The cover of the rear pillar trim can easily be displaced frontward along an airbag deployment joint. When inflated, the curtain airbag fixed to a vehicle body along an upper edge and a rear edge of the side window glass in a retracted position deploys into the vehicle interior upon separating and displacing the cover of the rear pillar trim frontward from the other part thereof.