A connector with a locking and unlocking mechanism is disclosed. The connector includes a case, a spring member and an unlocking member. The case includes a guiding groove, a narrow groove, a protrusion, a vertical stop wall and a latching groove. The spring member and the unlocking member are mounted the case. The unlocking member includes a guiding arm, a latching plate and a bending end. A vertical portion of the unlocking member is inserted between the spring member and the case. The guiding arm extends into the corresponding guiding groove. The latching plate enters into the latching groove. The bending end enters into the narrow groove and covers the protrusion. When a pulling portion is pulled back, the vertical portion compresses the spring member, the latching plate slides back along the latching groove, and the bending end moves back along the protrusion.