Abstract: A quantitative powder material dispenser includes a base frame having a center coupling hole and an eccentric dispensing hole, a dispensing wheel rotatably supported on the base frame and having equiangularly spaced through holes and a bottom pivot shaft that is inserted through the center coupling hole of the base frame, a barrel fastened to the base frame around the dispensing wheel to hold a powder material and having an inside scraper blade kept in contact with the dispensing wheel above the through holes, and a driving device connected to the pivot shaft and controlled to rotate the dispensing wheel relative to the base frame for enabling the powder material to be dispensed through the dispensing hole quantitatively at a predetermined time interval subject to the speed of rotation of the dispensing wheel.