A powder and granular material feeder constantly feeding powder and granular material with poor fluidity that is discharged to an annular passage between inner and outer tubes through a clearance between a lower end of the inner tube and a bottom plate from a fall opening, outside of the feeder, by scraping plates immediately below the fall opening. The fall opening has an arcuate configuration starting on an outer side of the outer tube to the inner tube or to an inner side of the inner tube. The scraping plates are located on a small cylinder around the center of curvature. The scraping plates and spokes rotate in opposite directions from each other at a portion of the fall opening, and the powder and granular material transferred by the spokes and inward claws into the fall opening is discharged in a direction opposite to the feeding direction and leveled by an lower edge of the outer tube.