PURPOSE: To prevent rain drops from falling on an occupant opening an opening/ closing panel by providing a rain drop avoiding means for making rainwater, infiltrating between a hollow body and the opening/closing panel, drip down from the side part of the opening/closing panel, and prevent rain drops from infiltrating into a breathing passage by providing the rain drop avoiding means with the breathing passage in a space in the hollow body.

CONSTITUTION: Rainwater infiltrating between a rear finisher 10 and a trunk lid from the upper part is made drip downward from the side part lower part of the trunk lid, along the inclination of a channel 20 and an elastic member 22 so as to prevent rain drops from falling on an occupant opening the trunk lid, and even if rainwater infiltrates between the rear finisher 10 and the trunk lid from the upper part, this rainwater is prevented from infiltrating into the rear finisher 10 through a breathing passage 21.