A shield member comprises an outer shield portion, an inner shield portion, and a connecting portion. The outer shield portion and the inner shield portion have annular shapes. The connecting portion connecting the outer shield portion with the inner shield portion has a cylindrical shape. The shield member has a cylindrical shape as a whole. A top potion of the outer shield portion has a dam portion which protrudes in an axial direction of the outer shield portion and elongates in a peripheral direction of the outer shield portion. A surface of the dam portion and a surface of the outer shield portion form a gutter-like guiding portion. The shield member shields an outer opening of a outer side member, and shields at least one of an inner opening of an outer wheel housing and an outer periphery of an inlet filler pipe.