A fiber optic connector includes a ferrule, an insert body, a tail sleeve and two core heads. The ferrule includes an outer frame, and an operating handle extending rearwardly from the outer frame. The outer frame is formed with an inserted opening open along a front-rear direction and two limiting slots open along a left-right direction and spaced apart from each other along the left-right direction. The insert body is detachably inserted into the ferrule and includes two protrusion units protruding away from each other along the left-right direction and respectively movable in the limiting slots.