PURPOSE: To distribute grains in equal amounts to each chute by applying a turning, rocking, or vibrating motion to an assembly consisting of a central chamber whose upper part is provided with a powder granules supply port and plural chutes with discharge port for powder granules.

CONSTITUTION: On a shfter, a central average box 15 limiting a central accumulating chamber 14 is provided through a support pillar in such a way that the movement of a device with a shifter 12 and serving to give a turning motion is transmitted and powdery granules supplied from a supply port 30 to the central chamber 14 is equalized. To the central chamber 15, a chute 17 extending to each section of the shifter and having an outlet 16 at its top is attached, and in a transition region from the central chamber 14 to each chute 17, a gate 19 consisting of two gate plates 20 and 21 controlling the flow of powdery granules is provided. Also, in the central chamber 14, a netted buffering and dispersing means 32 easing the drop impaction of powdery granules charged from the supply port 30 is provided.