An electronic device including a casing, an optical fiber connector and a protecting cover is provided. The case includes an opening and a first engaging member. The optical fiber connector is disposed in the opening. The protecting cover is disposed at the opening and includes a second engaging member movably engaged with the first engaging member so that the optical fiber connector is exposed or shielded by the protecting cover. An optical fiber connector having a connecting port, a first engaging member and a protecting cover is further provided. The first engaging member is disposed besides the connecting port. A second engaging member of the protecting cover is movably disposed at the first engaging member so that the protecting cover exposes or shields the connecting port. The protecting cover is capable of fixing an optical fiber cable and shielding a light emitted from the optical fiber connector.