A hair cosmetic composition containing a polyether polycarbonate having a structural unit represented by the following formula (1):[wherein A represents a C2 to C6 alkylene group;n represents an average number of 5 to 1,000;p represents an average number of 5 to 100;and (n×p) units of AO may be the same or not].一種毛髮化妝料,其含有具一般式(1)所示構成單位的聚醚聚碳酸酯。(式中,A表示碳數2~6之伸烷基,n為平均值,表示5~1000之數,p為平均值,表示5~100之數,(n×p)個之AO可為相同或相異。)