An optical connector includes a first optical-electric coupling element, a second optical-electric coupling element, and a fixing device. The first optical-electric coupling element defines a first cavity and a second cavity. The second cavity includes two opposite first sidewalls. Each first sidewall defines a locating cutout. The second optical-electric coupling element is received in the second cavity, and defines a third cavity. The third cavity includes two opposite second sidewalls. Each second sidewall defines a through hole. The fixing device includes two elastic deformable portions conforming the two through holes, and a number receiving holes each for receiving a optical fiber. The fixing device is received in the through holes, with the elastic deformable portion resisting against an internal sidewall of the locating cutout, to firmly lock the second optical-electric coupling element into the second cavity of the first optical-electric coupling element.