To remove the smell generated at the time of manufacturing molded automobile ceilings and to prevent the occurrence of warping and distortion thereof due to heat/pressure molding.

A core material to be used for the manufacture of the automobile ceilings is made of composite materials having inorganic fibers bound by Diallyl Phthalate resin family compositions, or of composite materials having an organic expanded resin sheet to whose one face or both faces inorganic fiber mats ingrained with Diallyl Phthalate resin family compositions are stuck.