An artificial hair fiber bundle comprising: a mixture of a synthetic acrylic base fiber (A) made of an acrylic base copolymer containing acrylonitrile, vinyl chloride and vinylidene chloride and a first vinyl monomer copolymerizable therewith, a synthetic acrylic base fiber (B) made of an acrylic base copolymer containing acrylonitrile, vinyl chloride and a second vinyl monomer copolymerizable therewith; a synthetic polyvinyl chloride base fiber having a monofilament fineness of 30 to 90 decitexes, provides a hair decorative product superior in stylability and sensory characteristics and favorable for use as a wig, hairpiece, or the like.