The object of the present invention is to manufacture a masking member having a complex shape and being highly accurate. To attain said object, the present invention provides a masking member made of a modified polypropylene in which 5 to 30% by weight of polyethylene and/or ethylene-propylene copolymer is mixed in with polypropylene. In a case where polyethylene and/or ethylene-propylene copolymer is mixed in with polypropylene, the elongation of said polypropylene improves, also improving its moldability.