Abstract: A pressure regulating valve for pressure cookers comprises a tubular projection (1) protruding from a cooker lid (2) and on which a needle (4) is poised, that is mounted to the bottom of an inverted cup shaped cylindrical body (6) provided with an external upper threaded projection (7) on which a head (8) is screwed. Steam escape openings (9) and a lower aperture are surrounded by an internal rim (10) and by an external ferrule (11). The rim is screwed on the end outside thread of the tubular projection (1), and the ferrule supports two selectively used weights, bottom (14) and top (15) defining together a spherical shape in the present device. The cup shaped piece (6) is provided with internal longitudinal channels (17) at the bottom of which there are corresponding steam escaping openings (9).