An electrical junction box facilitates a worker's wiring of a wire harness
without using a superfluous component and allows the workability in
assembling the electrical junction box as well as that in disassembling
to be improved. The electrical junction box includes a box body and a
cover to be mounted to the box body after wiring wire harnesses about the
box body. The box body has wiring grooves shaped to have U-shaped cross
sections and arranged on its exterior surface to accommodate the wire
harnesses, which have been drawn out of the box body through its one side
and further led from an upper part of the one side downwardly. Left and
right sidewalls defining each groove are provided, at their leading ends,
with temporary locking parts restricting slipping of the wire harness out
of the wiring groove. The cover is provided with restricting walls
(sidewalls, rib) restricting outward deflection of the left and right
sidewalls. In mounting the cover to the box body, the restricting walls
are inserted to the outside of the sidewalls and between the adjoining
sidewalls. The restricting walls have withstanding parts formed to
prevent the temporary locking parts from being deflected outside.