Air bag housing cover

The present invention relates to an air bag housing cover comprising (A) an olefin-based thermoplastic elastomer comprising (A1) a propylene homopolymer having an isotactic index of not less than 90%, and (A2) a copolymer of propylene and a C2 to C8 alpha -olefin other than propylene, said propylene homopolymer (A1) and said copolymer (A2) being present in amounts of 30 to 60% by weight and 70 to 40% by weight, respectively, based on a total amount of the components (A1) and (A2), and said copolymer having propylene unit and ethylene unit as essential constituting units, said olefin-based thermoplastic elastomer (A) being obtained by producing the component (A2) by polymerization subsequent to the production of the component (A1) by polymerization, and having a 0 DEG C eluate content of 30 to 60% by weight based on a total eluate content as measured at a temperature between 0 DEG C and 140 DEG C by a temperature rising elution fractionation using o-dichlorobenzene as a solvent.