Greenhouse comprising - a single bay or multiple bays next to each other; the or each bay having a a roof (12, 13), of the type with ridge substantially parallel to the longitudinal development of the greenhouse and opposite inclined pitches, through which sunlight can at least partly pass for allowing cultivation underneath, - at least two openable portions of the said roof for allowing aeration of the greenhouse, arranged close to the ridge of the roof, arranged opposite and along the same longitudinal position relative to the ridge of the roof, said at least two openable portions of roof being adapted to rotate around an axis substantially parallel to the development of the ridge of the roof of the greenhouse in relation to one side of the respective portion of roof, such that they are pivoting from a closed position to a maximum opening position, characterised in that, - for each pitch of the roof, a fixed portion, arranged lower and contiguous to a respective said pivoting portion along the same longitudinal position relative to the ridge of the roof, said fixed portion being made of a material through which sunlight can pass, and - at least two photovoltaic modules, each fixed to, or forming part of, a respective said pivoting portion of roof, so that said pivoting portions of roof with said respective photovoltaic modules being part of respective inclined pitches of the roof (12, 13) and being close to the ridge of the roof; when the inclination of said pivoting portions change, said respective photovoltaic modules follow the movement of the pivoting portion, wherein, for at least a part of the movement thereof, said two pivoting portions (13A, 13A') carrying respective photovoltaic modules (15, 15') are substantially parallel and/or aligned with each other.. - a single bay or multiple bays next to each other; the or each bay having a a roof (12, 13), of the type with ridge substantially parallel to the longitudinal development of the greenhouse and opposite inclined pitches, through which sunlight can at least partly pass for allowing cultivation underneath, - at least two openable portions of the said roof for allowing aeration of the greenhouse, arranged close to the ridge of the roof, arranged opposite and along the same longitudinal position relative to the ridge of the roof, said at least two openable portions of roof being adapted to rotate around an axis substantially parallel to the development of the ridge of the roof of the greenhouse in relation to one side of the respective portion of roof, such that they are pivoting from a closed position to a maximum opening position, characterised in that, - for each pitch of the roof, a fixed portion, arranged lower and contiguous to a respective said pivoting portion along the same longitudinal position relative to the ridge of the roof, said fixed portion being made of a material through which sunlight can pass, and - at least two photovoltaic modules, each fixed to, or forming part of, a respective said pivoting portion of roof, so that said pivoting portions of roof with said respective photovoltaic modules being part of respective inclined pitches of the roof (12, 13) and being close to the ridge of the roof; when the inclination of said pivoting portions change, said respective photovoltaic modules follow the movement of the pivoting portion, wherein, for at least a part of the movement thereof, said two pivoting portions (13A, 13A') carrying respective photovoltaic modules (15, 15') are substantially parallel and/or aligned with each other..