ELECTRICAL JUNCTION BOX

An electrical junction box including: bus bars; a circuit board of which one side opposes the bus bars; a conductive portion that is provided on the one side of the circuit board, and is exposed from the other side of the circuit board; an opening that is provided in parallel with the conductive portion in the circuit board, and from which a portion of the bus bars is exposed; a switching element that is arranged on the other side of the circuit board, and of which an input terminal or an output terminal is connected to the conductive portion; and a conductive piece that is arranged straddling a portion of the bus bars and the conductive portion.