A device for detecting breakages in high-pressure processing bags, the processing machine having a treatment vessel and two plugs (5a,5b) for closing the same, characterised in that the device is equipped with an elongated electrode (1) adapted to partially extend through the inside of one of the plugs (5a, 5b) in its proximal part and, in its distal part, adapted to extend into the bag (6) containing the product to be processed, the electrode being electrically insulated by an insulator (2) along its entire length, except in the part inside the bag (6) and in contact with the product, wherein the proximal part of the electrode (1) intended to extend out of the plug is connected to a power source and a device for measuring the electrical current, the resistance or the capacitance of a circuit, wherein said device is electrically connected by closing a circuit between the electrode and a pressurization water.