Waterproof structure of electrical junction box

A waterproof structure of an electrical junction box including a junction box main body and a tubular wire cover, the junction main body having a groove formed on an outer wall of the junction box main body, and the wire cover being slidably engaged with the groove of the junction box main body, wherein an electric wire is passed downward through the wire cover and fixed to a lower portion of the wire cover using a tape,

• the waterproof structure comprising a step portion as a water stop formed on a back wall of the groove of the junction box main body, wherein a rear wall of the wire cover is arranged in contact with or adjacent to the back wall of the groove of the junction box main body so that the step portion formed on the back wall of the groove prevents water from entering into the electrical junction box from bottom along the back wall of the groove through the electric wire.