A latch locking type connector has one elastic cantilever and an actuation plate respectively disposed with an inclined plate and a slide corresponding to each other. The upward movement of the inclined plate resulting from the sliding contact of the slide and the inclined plate raises a free end of the elastic cantilever to separate a connector casing from a lead frame. The elastic cantilever pushes and contacts in an opposite direction to return the actuation plate to its original place while allowing a free end of the elastic cantilever to return to its normal position to produce an expected latch locking function when the connector casing and the lead frame are connected to each other once again.