ARTICLE FIXATION APPARATUS AND ARTICLE FIXATION STRUCTURE ASSEMBLY METHOD

An article fixation apparatus includes an article attachment member and a first seal material. The article attachment member includes a protrusion part which protrudes toward a vehicle outside via a penetration hole of a roof panel from a vehicle inside of the roof panel and which fixes an article and a head part seat surface that is joined to a lower surface side of a reinforcement member. The first seal material prevents water permeation to the vehicle inside of the roof panel from a gap between the penetration hole and the protrusion part.