ELECTRICAL JUNCTION BOX

An electrical junction box includes a circuit board, a branch circuit assembly for distributing power to various devices, a housing that accommodates the circuit board and the branch circuit assembly, and a board-side connector module in which a plurality of board-side connectors mounted on the circuit board are formed as a single body. The branch circuit assembly includes an internal circuit including busbars and an electrical component, a case that accommodates the internal circuit, and a plurality of relay connectors that protrude from the case, are electrically connected to the internal circuit, and are respectively connected to the plurality of board-side connectors, and the board-side connectors are connected to the corresponding relay connectors in a state in which the branch circuit assembly and the circuit board are assembled to the housing.