ELECTRICAL CONNECTION BOX

An electrical junction box of the present invention includes a frame (11) in which a storing box B is formed which has a unit storing room (20) in which an electronic control unit (63) is accommodated, and an upper cover (15) which is assembled to the side of the frame (11) where a accommodating port (20a), which becomes an entrance when the electronic control unit (63) is accommodated in the unit storing room (20), is formed so that the accommodating port (20a) is closed.