A roof structure for an agricultural vehicle includes an upper roof assembly, a lower roof assembly, and an air-conditioning chamber formed in the lower roof assembly. The upper roof assembly is connectable to the lower roof assembly to surround the air-conditioning chamber. An inlet chamber and an outlet chamber for air-conditioned air are provided such that the inlet chamber and the outlet chamber between the lower roof assembly and the upper roof assembly include chambers separated from each other. The structure also includes a circulation opening for supplying recirculated air arranged at the inlet chamber and an air-guiding element arranged in the inlet chamber, at the circulation opening, and at the air-conditioning chamber. A region is sealed in relation to an external environment.