Harness slack holding apparatus for sliding car doors

A harness slack absorbing apparatus includes a resilient member 6, a harness support member 7 attached to a distal end portion of the resilient member, and a wire harness 4 supported by the harness support member and pushed upward by resilience of the resilient member thereby to absorb a slack of the wire harness. The harness support member 7 includes a recess 8 having a curved shape in cross section, in which the wire harness is held. The harness support member 7 may be provided at its distal end with a curved or inclined face 39 which is continued from the recess in a shape along a bending direction of the wire harness. The recess may have a depth at least larger than a radius of the wire harness. The harness support member may be composed of a support member body and a lid respectively having recesses adapted to be joined together to form a harness insertion bore, so that the wire harness can be held by the member body and the lid along an entire circumference thereof. The harness support member 7 includes an insertion slit for the resilient member 6 and locking means.