An electrical junction box having a structure in which a lever of a lever type connector engages a connector hood and a deflection of a wall portion can be prevented without increasing of a resin amount. Latch projections protrude from a wall portion of the connector hood toward the inside of the connector hood. The latch projections engage guide grooves in a lever of a connector. A plurality of lightening holes are formed in the wall portion. The latch projections are supported on a solid part of the wall portion that is not provided with the lightening holes.