(A) a polyoxyethylene alkyl ether sulfate, (B) an amphoteric surfactant, (C) N- acylamino acid ester, (D) the mean molecular number of added ethylene oxide is 5 to 30, polyoxyethylene hydrogenated castor oil, and (E) and cationic-containing polymer, wherein (C) the content of the N- acyl amino acid ester (% by weight), the (D) of the mean molecular number of added ethylene oxide is 5 to 30, polyoxyethylene hydrogenated castor significant content (mass%) the mass ratio (D / C) of the, there is provided a hair detergent composition of from 1 to 12.5.(A) 폴리옥시에틸렌알킬에테르 황산염, (B) 양성 계면활성제, (C) N-아실아미노산에스테르, (D) 에틸렌옥사이드의 평균 부가몰수가 5∼30인 폴리옥시에틸렌경화피마자유 및 (E) 카티온성 폴리머를 함유하고, 상기 (C) N-아실아미노산에스테르의 함유량(질량%)과, 상기 (D) 에틸렌옥사이드의 평균 부가몰수가 5∼30인 폴리옥시에틸렌경화피마자유의 함유량(질량%)과의 질량비(D/C)가, 1∼12.5인 모발 세정제 조성물을 제공한다.