To provide a leak preventing structure of a high-voltage connector in a vehicle connector with which leak between a connector cover and a connection place at which an internal cable is connected to a high-voltage connector through a bolt can be surely prevented without steeply increasing manufacturing cost.

An internal cable 14a connected to a coil every phase is drawn out from an upper discharge hole 18a of a coil cover 18 to the outside, connected to a terminal fitting 23 of a high-voltage connector 20 and covered by a dual-partitioned insulating cover 27. A cylindrical oil guide 33 is disposed so as to connect the upper discharge hole 18a and the cable connection plate 26 of the high-voltage connector 20. Oil from the upper discharge hole 33a is guided to the cable connection plate 26 by the oil guide 33, and the cable connection plate 26 and the insulating cover 27 are wetted with the oil, thereby preventing leak between the cable connection plate 26 and the connector cover 29 located in the neighborhood of the cable connection plate 26.