To provide an upper cover structure of an electric wire reel which is used for the electric wire reel in which an electric wire is wound in a coil shape.

In an upper cover structure of an electric wire reel in which standing-up walls 3 are erected in a plurality at proper intervals along the same circumference on an upper surface 2 of a platelike base board, and am upper cover 1 by forming notch parts toward the other side on one side of lower half parts of the standing-up walls is installed in one of both outer peripheral surface of a bobbin-shaped electric wire reel in which an electric wire is wound, preventive members 4 to prevent a hitch between the electric wire pulled of the electric wire reel and the notch parts are arranged in the notch parts so as to become a narrower width than standing-up walls as well as to fit for an outside wall surface shape, and groove parts 5 are formed.