radiation in the sunlight can be kept from being directly applied to the sections specifically the infrared transmission inhibition layer 44 of the outer wall 40 the first inner layer 46 the second inner layer 48 the first outer side wall 52 a of the first side wall 52 the second outer side wall 54 a of the second side wall 54 and the inner transparent portion 50 c of the inner wall 50 of the pillar member 32 placed on the cabin c side the closed cross section 34 side of the surface 40 a of the outer wall 40 consequently ultraviolet radiation induced degradation of the sections of the pillar member 32 placed on the cabin c side of the surface 40 a of the outer wall 40 can be reduced in particular the transparency of the infrared transmission inhibition layer 44 and the inner transparent portion 50 c of the inner wall 50 can be kept from being reduced because the infrared transmission inhibition layer 44 and the inner transparent portion 50 c of the inner wall 50 are configured by a transparent resin material furthermore in the outer wall 40 the infrared transmission inhibition layer 44 is placed adjacent to the closed cross section 34 side of the entire ultraviolet transmission inhibition layer 42 additionally the vehicle width direction inner end portion 44 a of the infrared transmission inhibition layer 44 is disposed between the ultraviolet transmission inhibition layer 42 and the first inner layer 46 and the vehicle width direction outer end portion 44 c of the infrared transmission inhibition layer 44 is disposed between the ultraviolet transmission inhibition layer 42 and the second inner layer 48 for this reason ultraviolet radiation in.