An electrical connector has an insulative body and multiple terminals. The insulative body has multiple mounting holes and multiple guiding channels. The terminals are mounted respectively in the mounting holes and each terminal has an electrical contacting portion mounted slidably in one of the guiding channels. The guiding channels guide and ensure a corresponding electrical contacting portion to move linearly without being inadvertently jammed or irrecoverably deformed. Therefore, the life-span of the electrical connector is increased.