Patent ID: 7544887

Claim:
An electrical junction box comprising: a casing body; and a lower cover to be attached to the casing body, the lower cover having a mating face that is inclined downward from a first side to a second side of said casing body, wherein said casing body includes: casing body slant portions provided on lower end edges of opposite side walls, the casing body slant portions extending downward from the first side to the second side; and a double wall structure including an outer peripheral wall and an inner peripheral wall, the double wall structure being formed on the casing body along the lower end edges including the casing body slant portions, a distal end of the inner peripheral wall projecting over that of the outer peripheral wall, and the inner peripheral wall being provided with guide ribs on the distal end of the inner peripheral wall that projects over the outer peripheral wall, the guide ribs protruding toward the outer peripheral wall; wherein said lower cover includes: lower cover slant portions provided on upper end edges of opposite side walls, the lower cover slant portions extending downward from the first side to the second side along the casing body slant portions; and an engaging rib that contacts a lower end of said outer peripheral wall, the engaging rib being provided on the upper end edges on opposite side walls of said lower cover, the upper end edges opposing the lower end edges on the opposite side walls of the casing body, wherein a protrusion piece projects from the engaging rib and is inserted into a clearance between the inner peripheral wall and the outer peripheral wall of the casing body.