Provided is a fiber treatment agent for non-woven fabrics, which can impart hydrophilicity and repeated water permeability to a non-woven fabric and can prevent the transfer to other region in an article having a non-woven fabric used therein. The fiber treatment agent for non-woven fabrics according to the present invention contains the following components (A) and (B): (A) at least one component selected from an alkyl phosphoric acid ester salt and a polyoxyalkylenealkyl ether phosphoric acid ester salt; and (B) at least one component selected from a polyhydric alcohol fatty acid ester, a polyoxyalkylene polyhydric alcohol fatty acid ester and a naturally occurring wax each of which has a melting point of 15°C or higher.