An electrical connection box capable of suppressing ingression of liquid is provided. The electrical connection box is configured to house an electrical device, to interconnect a plurality of in-vehicle device via the housed electrical device, and to be provided in a vehicle, and includes an insertion port that passes through a side wall and into which an electric wire to be connected to the electrical device is inserted, and an eave portion that is provided along an upper edge portion of the insertion port and protrudes outwardly by a predetermined length.