A probe connector has a barrel having a main body, with a chamber defined therein, and a base connected with one end of the main body. The main body has a mounting opening at a substantially middle portion thereof and communicating with the chamber. A plunger includes a basic portion restricted in the barrel and a contact portion extended from one end of the basic portion and exposed from the other end of the main body opposite to the base. A resting element has a mounting slice received in the mounting opening, and a resting lump protruding from a side of the mounting slice and protruding into the chamber of the main body to rest against a side of the basic portion when the contact portion is pressed inside the barrel for deflecting the basic portion to contact an inner surface of the main body by an opposite side thereof.