A hair cosmetic composition includes an alkaline agent and an oxidant, and is constituted as a hair dye or a hair bleaching/dye removing agent. The hair cosmetic composition further includes (A) a cellulose derivative and (B) a polyethylene glycol having a number average molecular weight of 2,000 or less. The mass ratio of the content of the (B) component to the content of the (A) component is 1 to 50.
