Provided is an electrical junction box including a relief terminal portion having a structure in which the relief terminal portion can be constituted with a small number of parts and high space efficiency. The electrical junction box includes: a box body; and a power supply distribution bus bar that is disposed in the box body and includes a power supply input terminal portion and power supply branch terminal portions that are connected by a plate-shaped conducting portion. The relief terminal portion is constituted by at least a portion of the plate-shaped conducting portion of the power supply distribution bus bar being disposed in a state of protruding from the outer surface of the box body and exposed to the outside.