A continuous crystallization process comprising the steps of supplying a crystallization material containing bisphenol A to a crystallizer to form crystals of an adduct of bisphenol A and phenol or crystals of bisphenol A, subjecting the slurry discharged from the crystallizer to solid/liquid separation, and recovering the crystals, wherein part of the mother liquor is circulated to the crystallizer. According to this process, the heat duty to be removed is reduced, deposition of solids on the inner surfaces of the crystallizer, particularly on the heat transferring surface of the cooler is restrained, and consequently the continuous operating time of the apparatus is prolonged.