To provide a resin tablet feeding unit 4 which enables a storage part of a resin tablet cassette 18 to be changed depending on each type, without reference to an arrangement position 17 of a pot 16, and which can efficiently feed a resin tablet 15 to a resin tablet carrying-out unit 3.

This feeding unit 4 comprises at least the cassette 18 for storing the resin tablet 15, an extrusion mechanism 19 for extruding the resin tablet 15, and a receiving mechanism 20 for receiving the resin tablet 15. In the cassette 18, a required number of resin tablets 15, which serve as one group, are arranged as a required number of groups, without reference to the arrangement position 17 of the pot 16. When the resin tablets 15 are fed to the carrying-out unit 3, one group of the resin tablets 15 is collectively extruded by the extrusion mechanism 19 so as to be collectively delivered to the receiving mechanism 20, and the resin tablets 15 are each separately or sequentially fed to the carrying-out unit 3 from the receiving mechanism 20 and set in the arrangement position 17.