PURPOSE: To enable successive discharge by mounting a plurality of vanes around a rotor transversely with respect to a rotor shaft and turning the vanes inside a feeder body having a supply port at the upper end and a discharge port at the bottom.

CONSTITUTION: A plurality of vanes 4 are mounted around a rotor 5 transversely with respect to a rotary shaft 5a and housed inside a rotary feeder 1, whereby forming spaces 6 separated by the vanes 4 inside the body 1. The body 1 has both a supply port 2 at the upper part and a discharge port 3 at the lower part. In such constitution when the rotor 5 is turned, the spaces 6 successively reach the discharge port 3 from the end part thereof to continuously discharge material inside a feeder body. So the continuous discharge may be enabled.