To provide a connector lock capable of locking by mounting a connector lock in a connector port, unlocking by an unlocking signal from a terminal unit, and warning from the terminal unit when unlocking is performed fraudulently.

In this connector lock, a guide spring 12 is attached to a spring guide part 23 of a lock guide 4, and a lock guide projecting part 22 is engaged with a lock guide mounting hole 24 of a hinge guide 6 at the same time. A terminal circuit assembly 9 is tightened together with the hinge guide 6 and a solenoid assembly 8 by a screw A14. A slide plate 3 is built in from behind the hinge guide 6 and is arranged in a rear part of the solenoid assembly 8 by a spring receiving part 27 and a release spring 11. A pin spring 13 is attached to a lock pin 10 and is arranged in a lock pin switch part of a grip 2, and a connector assembly is built in by a screw B15.