A green and efficient iridium-catalyzed asymmetric transfer hydrogenation of alkynyl ketones to chiral propargylic alcohols has been developed. By using sodium formate and ethanol as hydrogensources, a series of alkynyl ketones were hydrogenated by chiral spiro iridium catalyst (S)-1b to provide optically active chiral propargylic alcohols with up to 98% ee under base-free conditions. This protocol