A protective cover for a network cable socket is disclosed. The protective cover is moveably connected to the network cable socket. The protective cover of the network cable socket comprises a housing and two elastic sheets. The housing is moveably connected to the network cable socket. Each of the elastic sheets includes a fixing portion, an extension arm, a stopper and a guiding ramp. The two extension arms are connected to the two fixing portions, respectively. The two fixing portions are fixed to two sides of the housing, respectively. The two stoppers and the two guiding ramps are formed at the two extension arms, respectively. A distance between the two guiding ramps is larger than the distance between the two stoppers.