PURPOSE: To obtain a polypropylene resin molding in which a specific lamella can be obtained by a transmission type electron microscope, extremely excellent in physical properties and high in industrial value.

CONSTITUTION: The polypropylene molding in which a lamella having ≥1μm length is observed using a transmission type electron microscope. The molding is preferably obtained by mixing a crystalline copolymer of propylene and vinylsilane with a crystalline polypropylene and further mixing the mixture with a catalyst, heat-melting the mixture and subjecting the melt to injection molding, etc.