Screw compressor with cooling

A screw compressor having two screw rotors comprising a suction side, a pressure side and a rotor shaft, a stationary bearing tube mounting a rotor on the pressure side thereof and enclosing the rotor shaft, and at least one rotor-side bearing enclosed by the bearing tube, said bearing tube protruding into the rotor and having a peripheral surface in confronting relationship with a complementary surface of the rotor, said bearing tube being actively cooled by a fluid forced to flow through a cooling passage, said peripheral and complementary surfaces being arranged in such a way as to be capable of heat exchange relative to one another whereby the rotor is cooled to a greater extent on the pressure side than on the suction side by virtue of the fact that the part of the bearing tube protruding into the rotor is cooled by said heat exchange.