A volumetric compressor, comprising: - a main hollow body defining an operating chamber for accommodating at least two lobe rotors (80', 80") rotating about respective substantially parallel rotation axes (Y1, Y2); - at least one head provided at an end of said body; - at least one cover fixed to said head so as to define a head volume comprised between said cover and said head and susceptible during operation, to accommodating a lubricant bath; - at least two rolling bearings, each rolling bearing being interposed between said head and a respective lobe rotor (80', 80") of said at least two lobe rotors (80', 80") to allow the rotation of the respective lobe rotor (80', 80") about the respective rotation axis (Y1, Y2); - at least two lubrication ducts, each lubrication duct extending between a lubrication opening in said head volume and a respective rolling bearing of said at least two rolling bearings, the volumetric compressor being characterised by further comprising: - an oil distribution disc accommodated in the head volume and integrally connected to one of said at least two lobe rotors (80', 80"), said oil distribution disc being susceptible when put into rotation, to moving the lubricant of said lubricant bath; - a container for collecting said lubricant moved by said oil distribution disc, said container being arranged at a higher level with respect to said lubrication opening, - at least two lubricant distribution channels, wherein each lubricant distribution channel extends from said collecting container so that said lubricating oil flowing along the same distribution channel reaches said lubrication opening of a corresponding one of said lubrication ducts. - a main hollow body defining an operating chamber for accommodating at least two lobe rotors (80', 80") rotating about respective substantially parallel rotation axes (Y1, Y2); - at least one head provided at an end of said body; - at least one cover fixed to said head so as to define a head volume comprised between said cover and said head and susceptible during operation, to accommodating a lubricant bath; - at least two rolling bearings, each rolling bearing being interposed between said head and a respective lobe rotor (80', 80") of said at least two lobe rotors (80', 80") to allow the rotation of the respective lobe rotor (80', 80") about the respective rotation axis (Y1, Y2); - at least two lubrication ducts, each lubrication duct extending between a lubrication opening in said head volume and a respective rolling bearing of said at least two rolling bearings, - an oil distribution disc accommodated in the head volume and integrally connected to one of said at least two lobe rotors (80', 80"), said oil distribution disc being susceptible when put into rotation, to moving the lubricant of said lubricant bath; - a container for collecting said lubricant moved by said oil distribution disc, said container being arranged at a higher level with respect to said lubrication opening, - at least two lubricant distribution channels, wherein each lubricant distribution channel extends from said collecting container so that said lubricating oil flowing along the same distribution channel reaches said lubrication opening of a corresponding one of said lubrication ducts.