A device for locating and disintegrating concretions and stones in bodily cavities by means of a shock wave generator comprises a reclining surface for the patient, with an opening therein below which the generator, including a flexible precursor section, is so arranged that the fluid sealed off from the outside is in contact via the opening with the body section to be treated, either directly or indirectly via a diaphragm sealing off the precursor section. To this end, the reclining surface and the shock wave generator are displaceable with respect to each other.