PURPOSE: To provide a mechanism for mechanically replenishing yarn feeder units different in the kind of the yarn to weaving machines.

CONSTITUTION: The mechanism (10) for replenishing yarn feeder units (12) different in the kind of the yarn to plural weaving machines established in a fabric-weaving factory involves yarn feeder unit-receiving units (14) set in the neighborhood of the respective weaving machines and a conveyer (16) for conveying the yarn feeder units along the receiving units. The conveyer is equipped with holders for holding or supporting the plural yarn feeder units at mutually different positions corresponding to the kind of the yarn and the receiving unit is equipped with a receiving member (24) capable of selectively moving between a position for engaging with one of the yarn feeder units so as to receive it from the holder and another position.