Optical fiber connector, comprising: - a ferrule, housing a plurality of terminations of optical fibers, and - an inner housing arranged around the ferrule and comprising a rear portion and a front portion configured to be inserted into an optical fiber adapter, wherein the front portion of the inner housing is releasably connected to the rear portion of the inner housing and comprises a frame, configured to surround an outer surface of the ferrule, and a key configured as an elongated tab extending in cantilevered fashion backwards from said frame along a longitudinal direction of the connector, said key being configured to mate with a corresponding keyway provided in the optical fiber adapter, and wherein the front portion of the inner housing is releasably connected to the rear portion of the inner housing by means of a first coupling member associated to the front portion of the inner housing cooperating with a second coupling member associated to the rear portion of the inner housing, in either one of: - a first orientation in which the key extends along an upper wall of the inner housing, said first orientation corresponding to a first polarity of the connector with respect to the adapter, and - a second orientation in which the key extends along a lower wall of the inner housing, said second orientation corresponding to a second polarity of the connector with respect to the adapter. - a ferrule, housing a plurality of terminations of optical fibers, and - an inner housing arranged around the ferrule and comprising a rear portion and a front portion configured to be inserted into an optical fiber adapter, wherein the front portion of the inner housing is releasably connected to the rear portion of the inner housing and comprises a frame, configured to surround an outer surface of the ferrule, and a key configured as an elongated tab extending in cantilevered fashion backwards from said frame along a longitudinal direction of the connector, said key being configured to mate with a corresponding keyway provided in the optical fiber adapter, and wherein the front portion of the inner housing is releasably connected to the rear portion of the inner housing by means of a first coupling member associated to the front portion of the inner housing cooperating with a second coupling member associated to the rear portion of the inner housing, in either one of: wherein the front portion of the inner housing is releasably connected to the rear portion of the inner housing and comprises a frame, configured to surround an outer surface of the ferrule, and a key configured as an elongated tab extending in cantilevered fashion backwards from said frame along a longitudinal direction of the connector, said key being configured to mate with a corresponding keyway provided in the optical fiber adapter, and wherein the front portion of the inner housing is releasably connected to the rear portion of the inner housing by means of a first coupling member associated to the front portion of the inner housing cooperating with a second coupling member associated to the rear portion of the inner housing, in either one of: - a first orientation in which the key extends along an upper wall of the inner housing, said first orientation corresponding to a first polarity of the connector with respect to the adapter, and - a second orientation in which the key extends along a lower wall of the inner housing, said second orientation corresponding to a second polarity of the connector with respect to the adapter.