The present invention relates to a composition for keratin fibers comprising: (a) at least one non-neutralized anionic surfactant； (b) at least one non-ionic surfactant； (c) at least one fatty alcohol； and (d) at least one alkaline agent, wherein the composition does not comprise more than 2% by weight of a phosphoric surfactant. The present invention can provide the composition for keratin fibers which can suppress its ammonium odor and have improved stability.
