A provided powder/granular material feeding device fully satisfies the function of sufficiently preventing bridges and ratholes and the function of favorably stabilizing the filling rate of an outlet portion. Moreover, the powder/granular material feeding device does not require consumable items such as a flexible chute or leave a large amount of powder/granular material in a specific region inside a chute. The powder/granular material feeding device includes: a hopper 1 that receives powder/granular material; an outlet portion 2 that discharges powder/granular material; a chute 3 that guides, into the outlet portion 2, powder/granular material dropped from the hopper 1; and a stirring part 4 that rotates stirring members 4b about a shaft 4a protruding so as to tilt diagonally upward from the lower part of the interior of the chute 3.