Abstract: Towing suction device for a dredging craft, which device comprises at least one tube which extends in a dredging position at an angle of inclination with the horizontal outboard along side the craft, in which a displacable tube part is disconnectably coupled with a tube part that is fixedly arranged on board, which parts are disconnected in the non dredging position. A coupling tube section of the displacable tube part is fastened on a slide, which is displacable along a guide track, placed above the water line, between the coupled and the disconnected position. The guiding track is arranged on a deck of the craft, whereas the coupling end of the fixed tube part is arranged near the guide track on the deck. Preferably the slide-guide track unit extends transversely to the longitudinal direction of the craft.