Abstract: An electric connection box includes a casing formed with an inspection window, and an electrical connecting component accommodated in the casing. An identification mark attached to an outer face of the electrical connecting component indicates a production facility employed for production of the connecting component. Even when a number of electrical connecting components of the same kind are manufactured with use of a plurality of production facilities, it is possible to determine the facility employed for the production of the electrical connecting component accommodated in each individual electric connection box from outside of the connection box by visually confirming the identification mark attached to the electrical connecting component through the inspection window.

Abstract: An electrical connection box for carrying electrical components comprises first and second casings capable of being combined with each other and an electrically insulating wiring board located between the casings and having a wire laid in a desired shape thereon. The wiring board has a wiring path in a desired shape and a holding portion for holding the leader of the wire laid in the wiring path. The wiring board, first casing, and/or second casing is formed having a holding portion for holding the trailer of the wire and preventing interference between the wire trailer and the first or second casing that adjoins the wire trailer.