The pressure cooker has a pot (2) with a base and a side wall and an upper rim (6). A lid (3) can be connected to the pot (2) in a sealed manner along the abovementioned upper rim (6). In the presence of a predetermined positive pressure, a locking device (12) connects the lid (3) to the pot in a non-releasable manner in conjunction with a pressure element (11) arranged on the lid (3). The locking device (12), in a fitting (5) of the lid (3), has a rocker (12a) which is mounted in a movable manner and, for control purposes and in order to lock the lid (3), interacts with the pot (2) and the abovementioned pressure element (11). Locking takes place automatically when the pressure cooker is closed and the locking means can be produced in a reliable and cost-effective manner.