An electrical junction box includes a frame and a cassette block. The frame has a side wall, the frame having a first opening and a second opening provided at two ends of the side wall. The cassette block is to be attached to the frame from the first opening along a first direction and electric wires are drawn out along a second direction when the cassette block is attached to the frame, the first direction being a direction toward the second opening from the first opening, the second direction being another direction toward the first opening from the second opening. The cassette block has a jig engagement portion configured such that a jig inserted into the cassette block from a side of the second opening engages with the jig engagement portion and the cassette block is drawn into the frame by the jig moving in the first direction.