PURPOSE: To provide a protective device, in which the electrically connected sections of a clamp body, with which an overhead wire is compression-joined, and a jumper socket, with which a jumper wire is compression-joined, are covered and the infiltration of stormwater, etc., is prevented.

CONSTITUTION: A protective device 10, which consists of a conductive blank having elasticity and is formed in a shape that electrically connected sections are covered, in which hinge sections 34, 34 parallel with the axial direction of a clamp body 14 are mounted on the top side and which is divided into two at a center in the vertical direction with the exception of the top side and in which the ground side can be opened, is constituted. The electrically connected sections of an anchor clamp are covered with the protective device 10, the ground side is closed, and the infiltration of stormwater, dust, etc., to the electrically connected sections is prevented.