A photovoltaic greenhouse (1), comprising a structure (2) for supporting a roof (3) of at least one pitch, the roof (3) having at least one portion (3a) thereof that is totally free from photovoltaic panels in order to permit the incident solar rays to irradiate the bottom surface (3b) of the greenhouse, the remaining portion (3c) of the roof (3) being provided with photovoltaic panels (10) that have a capacity of absorption of incident solar rays that increases from a minimum value at the boundary with the portion (3a) of the roof that is free from photovoltaic panels, to a maximum value at the ridge (6) of the roof (3).