There is provided doll hair having an unprecedented curly hairstyle using a multifilament having a spiral structure with many random overlaps through a twisting step, a thermal fixing step, an untwisting step, and a thermal provisional fixing step. Specifically, the doll hair of the present invention is achieved by a multifilament processed through a twisting step, a thermal fixing step, an untwisting step, and a thermal provisional fixing step, wherein the number of twist in the twisting step is 100 to 600 times/m, the thermal fixing step is performed by treatment at 60 to 100.degree. C. for 1 to 60 minutes, the number of twist in the untwisting step is 1.1 times or more of the number of twist in the twisting step, the thermal provisional fixing step is performed by treatment at 50.degree. C. to 70.degree. C. for 5 to 30 minutes in a cone or hank, and the multifilament preferably has an apparent specific gravity of 0.02 to 0.1 g/cm.sup.3 and a stretching ratio of 1.0 to 15.0%.