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 X P) UNITS OF AO MAY BE THE SAME OR NOT].