A charging gun disconnecting apparatus including a housing disposed on a panel of a vehicle and coupled to a charging gun and a pushing unit disposed inside the vehicle and disposed inside the housing. The pushing unit includes a holder coupled to a hook of the charging gun and configured to move and to protrude to the outside of the panel of the vehicle and an ejector that protrudes to the outside of the panel together with the holder, the holder being movably disposed inside the holder to release a coupling between the charging gun and the housing while moving to the outside of the holder in a same direction in which the holder moves.