PURPOSE: To provide an equipment for uniformly distributing grain capable of uniformly and constantly distributing the grain in the prescribed direction irrespective of the fluctuation of the amount of the grain thrown into a tank.

CONSTITUTION: A tank 2 provided to the upper part is provided with a grain flow-down port 4 extending in one direction. A uniform grain distributor 3 is provided to the lower part of the grain flow-down port 4. The uniform grain distributor 3 is provided with grain flow-in opening parts 8, 9 in the direction orthogonal to the longitudinal direction of the grain flow-down port 4, and grain distributing bodies 6, 7 to divert the flow of the grain in two directions are continuously arranged. The tank 2 is provided with an opening control mechanism 13 to make the grain flow down over the whole width in the longitudinal direction of the grain flow-down port 4.