A quick locking and unlocking coupling for connecting lengths of flexible, corrugated conduit in end to end registration, or for attaching conduit to an outlet, feeder or source of, for example, industrial, high volume vacuuming equipment, includes a cylindrical conduit joining member having half sections that are insertable within the ends of the conduit lengths for aligning and supporting the conduit ends thereby establishing fluid, gas or material flow communication through the lengths of conduit. An annular center flange projects from the conduit joining member providing an abutment surface for the respective conduit ends, and a pair of pivotally joined arcuate arms are mounted to the flange and are movable from an unlocked position to a locked position encompassing the flange and the ends of the conduit thereby locking the coupling to the conduit ends and interconnecting the conduit lengths thus providing gas, fluid or material flow therethrough.