A medical instrument for endoscopic procedures that is provided with a hollow shaft, such that at least two channels are configured in the shaft and the channels can be coupled on the proximal end with supply conduits. To create a medical instrument of the aforementioned type which is of simple structure and ensures secure connect ability, it is proposed according to the invention that the proximal end of at least one first channel positioned in the shaft and the distal end at least one supply conduit that is to be coupled with this first channel are configured with respect to their geometric structural design in such a way that this first channel and the corresponding supply conduit can be coupled only with one another.
