A lower garnish arranged adjacent to the lower part of a tailgate includes a surface portion extending along an outer surface of an outer panel and a mounting portion disposed between the outer surface of the outer panel and an inner surface of the surface portion. The mounting portion includes a mounting seat extending along the outer surface of the outer panel and being mounted on the outer panel and a connecting wall connecting the mounting seat and the surface portion. The connecting wall has a first slit extending along a first direction directing from the surface portion toward the mounting seat and a second slit intersecting the first slit at right angles.