OBD connector protective cover

The present invention provides an OBD connector with an enhanced abuse prevention effect for the OBD connector and further provides a compact OBD connector protective cover also applicable to an OBD connector installed in a narrow space. An OBD connector protective cover 1 is provided with an opening 2, a body case 3 that can accommodate an entire OBD connector 100 from the opening 2, a slide cover 4 that is slidably attached to the body case 3 and opens/closes the opening 2 by sliding thereof, and a lock mechanism 6 that has a key cylinder 5 provided on a forefront of the slide cover 4 in a visually observable manner and locks the slide cover 4 by an operation of the key cylinder 5.