To provide a grain hopper capable of constituting a light and compact machine body to lower center of gravity when storing grains and reducing amount of grains remaining in the hopper without damaging grains when discharging them.

This grain hopper is provided with a machine frame body framed into a rectangular parallelopiped shape, side face walls surrounding four sides on inner side faces of the machine frame body, a bottom face inclined plate having an inclined face having substantially V shape when viewed on a rear face more than an inner bottom part of the machine frame body, and a discharge conveyance body in a V-shaped valley part of the bottom face inclined plate, which can rise and turn based on a turn support point provided on an inclined descent side. The bottom face inclined plate is constituted by a rigid body. The side face wall is constituted by a flexible sheet material. A compression elastic body connecting a lower part of the sheet material with the bottom face inclined plate to energize the bottom face inclined plate upward is provided. Consequently, the light and compact machine body can be constituted, and the rising and turning bottom face inclined plate does not have a slide part, thereby preventing damage of grains when discharging them.