An electrical connector includes: an insulative housing including a first insulative base with a first contact-receiving slot and a second contact-receiving slot and a second insulative base mounted to the first insulative base; an insulative cap attached to the insulative housing; a metal shell covering the insulative housing and the insulative cap; a static terminal received in the first contact-receiving slot; and a movable terminal received in the second contact-receiving slot. The movable terminal includes a resisting portion connecting and a pair of extension arms extending from the resisting portion. The second contact-receiving slot includes an engaging groove and a holding groove crossing with the engaging groove, the engaging groove defines a bottom wall inclining upwardly from a middle thereof to outer ends thereof to support the free ends of the extension arms. And the resisting portion is operable to be in touch with the bottom wall.