The present invention provides a container for raising small animals, which can be manufactured easily and the packaged size of which can also be rendered small. The container for raising small animals includes peripheral walls 21 to 23 enclosing the periphery, and is provided with a hard synthetic resin base 2 having an opened upper end and a top cover 6 which is positioned on the base to cover an upper space of the base 2. The base 2 is formed by assembling at least two independent components.