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.本發明提供一種毛髮化妝品組成物，其係構成為染髮劑或毛髮脫色/脫染劑的含有纖維素衍生物的毛髮化妝品組成物，能夠抑制塗抹性的降低。本發明的毛髮化妝品組成物含有鹼性試劑和氧化劑，係構成為染髮劑或毛髮脫色/脫染劑的毛髮化妝品組成物，其含有(A)纖維素衍生物、(B)數平均分子量為2000以下的聚乙二醇，(B)成分的含量相對於(A)成分的含量的質量比為1～50。該毛髮化妝品組成物還可以進一步含有(C)在25℃為液態的選自高級醇、油脂、烴、高級脂肪酸以及蠟中的至少一種油性成分。
