There are provided a device for fixing biomass-based solar heat and carbon dioxide gas with a similarity to containerized culture having high crop productivity, which is capable of fixing carbon dioxide gas highly efficiently, while being compact and easily managed, and a house equipped with the fixing device having an energy circulation system. The fixing device for biomass-based solar heat and carbon dioxide gas is configured to include an air intake unit which takes air into a box, a mesh-like air and water flow-through unit laid in the bottom of the box that is configured to be open to the atmosphere, a water reservoir tray on which the box is mounted, and cultivation soil which is held inside the box. Further, in the house relating to the present invention, the fixing device for biomass-based solar heat and carbon dioxide gas is arranged in an area that gets a lot of sunshine.