To provide a fodder tank that can reduce the effects of temperature and humidity increases in the tank and temperature and humidity differences between the daytime and night time by efficiently ventilating air in the tank and that has a simple structure.

The fodder tank A is equipped with a tank body 1 that stores fodder inside and has a fodder throwing opening 11 and a fodder discharge opening 12, and a support 2 that is extended upright on a tank installation face P and supports the tank body 1. The support 2 in the form of a hollow pipe is connected to an inlet/outlet opening 13 made through the tank body 1, thereby making the inside of the tank body 1 communicate with the inside of the support 2. In addition, a vent 21 is made in the support 2 for ventilating air.