PURPOSE: To fix or remove a conduit tube easily and speedily and facilitate and assembly of mutual components of a fixing apparatus in the fixing apparatus for fixing and connecting an end part of the conduit tube to a distributing box or a wire box.

CONSTITUTION: A protruding part 21, a groove part 22, and a plurality of protruding piece parts 23, 25 and 26 are provided on a shell part 2, and a protrusion 4 is installed inside the protruding piece part 26. A snap ring 5 with a split ring shape is fitted into the groove part 22, and the protruding piece parts 23, 25 and 26 are elastically energized inwardly. When fitting a conduit tube, the protrusion 4 is fitted into a recess of the outer surface of the conduit tube. When removing the conduit tube, the snap ring 5 is rotated and is run onto the protruding part 21 and further is shifted to the side of the shell part 2.