An electrical junction box has a main body provided with a circuit board, and a cover externally fitted to the main body. The electrical junction box is assembled in a state in which the main body is accommodated in the cover. The main body includes an opposing surface that opposes an inner surface of the cover. The opposing surface has a water capturing hole that is a recess that opens toward the inner surface of the cover. A first opposing distance between the inner surface of the cover and an upper opening edge of the water capturing hole is larger than a second opposing distance between the inner surface of the cover and a lower opening edge of the water capturing hole.