Connector for preventing unlocking

Disclosed is a connector for preventing unlocking. The connector for preventing unlocking may comprise: a first housing including a signal pin transmitting a signal, a body where the signal pin is inserted being insulated from the signal pin and transferring a ground voltage, a hollow formed inside the body and into which one end portion of the body is inserted, a screw groove which is capable of being screwed by rotation and which is formed on an inner circumferential surface of the one end portion, and at least one projection or a plurality of coupling grooves being formed on an inner circumferential surface of the other end portion; and a second housing having a hollow into which the other end portion of the body is inserted and transferred in an axial direction along the outer circumferential surface of the body, at least one projection, and, on an outer circumferential surface of the one end portion, all of the coupling grooves that are not formed on the first housing. When one end portion of the second