NOVELTY - The cover (1) has a fixing part (1c) fitted to an outer peripheral surface (11) of an exterior (4), with which two ends of a main body drum (1a) are equipped. Another fixing part (1b) is fitted to an outer peripheral surface of a companion part (3). The latter fixing part is equipped with an extended tongue part (17). A shield part (2) is inserted between the extended tongue part and the latter fixing part. The shield part is clamped between the latter fixing part and the extended tongue part while fixing the latter fixing part to the companion part.    USE - Dust cover for covering a connection area between a wiring and a companion part i.e. apparatus connection part, of an electric wire of automotive products e.g. motor unit, inverter unit and battery, mounted in vehicles such as hybrid vehicle and electric vehicle.    ADVANTAGE - The shield part is clamped between the fixing part and the extended tongue part while fixing the fixing part to the companion part, so that sealing performance with respect to a foreign material can be ensured, connection area between the companion part and the exterior can be sealed, penetration of the foreign material from an outer side can be prevented, number of parts can be reduced, cost of the cover can be reduced, process expense can be reduced, space for fixing the shield part to the companion part can be avoided, compactization of axial direction of a wiring can be attained, internal diameter of the dust cover can be enlarged, increase of dimension of the dust cover can be prevented, space saving can be attained, and attachment position of the cover can be pinpointed.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a wiring dust cover assembly method.    DESCRIPTION OF DRAWING(S) - The drawing shows a longitudinal cross-sectional view of a dust cover for wiring.    Dust cover for wiring (1)    Main body drum (1a)    Fixing parts (1b, 1c)    Shield part (2)    Companion part (3)    Exterior (4)    Outer peripheral surface (11)    Extended tongue part (17)