An electrical junction box is provided which has a novel structure that enables connectors to be stably connected even when an L-shaped connecting terminal is used as a connecting terminal of a lateral connection type connector. An upward extending portion (92) extending upright from an internal circuit (87) of a connecting terminal (90) is sandwiched by a housing (114) of a lateral connection type connector (128) and a terminal support (42), a first lateral support rib (64a) is provided on the terminal support (42), a second lateral support rib (64b) is provided on the housing (114), and a connecting portion (93) of the connecting terminal (90) is sandwiched by the pair of lateral support ribs (64a) and (64b) from both sides in the width direction.