Provided is a hair treatment composition capable of imparting good manageability and excellent hair feel to the hair upon finishing permanent wave or hair dye treatment. The hair treatment composition has the following components (A) and (B): (A) a compound represented by the following formula (1): R1O—(PO)n(EO)m—R2 (1) wherein R1 represents a linear or branched C8-12 alkyl or alkenyl group, PO represents a propyleneoxy group, EO represents an ethyleneoxy group, n represents an average addition mole number and is from 1.5 to 5.0, m represents an average addition mole number and is from 0 to 1.0, and R2 represents a hydrogen atom or a methyl group, and (B) at least one selected from keratin reducing agents, oxidizing agents, alkaline agents, and dyes for hair dye, wherein a content of an R1OH wherein R1 represents a linear or branched C8-12 alkyl or alkenyl group is 300 ppm or less.