To provide a high-voltage cable support, which can materialize the slack prevention of an insulator-covered cable strung between steel towers and the security of its durability, without raising the ground clearance of a power line, in the case of using a heavy insulator-covered cable as a transmission line for a specially high-voltage overhead electric line, a stringing structure for the high-voltage cable, and a method of stringing the high-voltage cable.

This high-voltage cable support 1 consisting of insulating material which is to be strung between two or more support towers T in a state with at least one insulator-covered high-voltage cable C is equipped with a flexible insulating envelope 2 which surrounds the periphery of the insulator-covered high-voltage cable and an insulating reinforcing member 10 which is integrated in the longitudinal direction of the insulating envelope.