An equipment case for use in an electronic device such as a radio wave wrist watch case comprises a metal case body, a metal back cover, a spacer member, and a ring member. The case body has an opening and houses an antenna inside the case body. The back cover covers the opening of the case body. The spacer member is provided between the case body and the back cover, and increases the electric resistance between the case body and the back cover. The ring member is screwed to the case body, and fixes the back cover to the case body by pressing the back cover against the spacer member towards the case body.