Abstract: A screen printing machine with an improved device for aspirating excess ink, comprising a printing bed for supporting a glass plate to be printed, which is provided in an upward region with a frame with a mesh surface forming a permeable portion. Ink is placed on the frame. The machine has a doctor unit comprising a doctor and a complementary doctor whose dimensions are equal to the width of the frame and which are adapted to move along the frame from one end to the other in order to respectively distribute and collect the ink. The machine further comprises a suction unit provided with a suction nozzle and means for guiding the nozzle along a preset path. The suction nozzle moves on the mesh surface so as to follow the path traced by the perimetric edge of the glass plate in order to aspirate the excess ink.