Grain storage device

The utility model provides a grain storage device capable of being maintained easily. A grain defluxion guide plate (56) is detachably installed on the position of the upper side of a carrying helix (8), the grain defluxion guide plate is provided with an inclined face enabling grains to flow downwards and guiding the grains to the carrying helix side, and a first opening part (54) for taking out and placing in of the grain guide plate is formed in the position, higher than the carrying helix, of a front wall (1f). A rod-shaped part (53) is configured on the position of the upper side of the carrying helix, the grain defluxion guide plate inserted from the first opening part is supported by the rod-shaped part, and the front wall and a rear wall are connected by the utilization of the rod-shaped part. A shaft sleeve part (8c), an input belt pulley (8b) and a tension arm (8d) can be integrally detached with the carrying helix, the shaft sleeve part is used for supporting a carrying helix rotary shaft on the fr