Abstract: A constant-quantity powder dispenser including a main body accommodating a powdered material and having an outlet opening, a valve seat in which the outlet opening is open, a closure ball movable to be seated on the valve seat to close the outlet opening at a position within the main body, and a coil spring disposed within the main body, so as to extend from the valve seat, the coil spring having a coil accommodating the closure ball therein such that the closure ball is movable within the coil between first and second positions in a vertical direction while the main body is oriented downwards with the outlet opening being open downwards outwardly of the main body. The ball is seated on the valve seat at the first position, and is spaced apart from the valve seat at the second position to permit dispensing of the powdered material.