A scroll compressor comprising: a sealed container ; a compression mechanism portion provided within the sealed container and having a compression chamber in which plate-like scroll teeth of a fixed scroll and an orbiting scroll are meshed with each other to compress a refrigerant; an electric motor provided within the sealed container and configured to rotationally drive the orbiting scroll ; a rotary shaft configured to transfer a drive force of the electric motor to the orbiting scroll ; a frame configured to rotatably support the rotary shaft ; balance weights fixed to an upper surface and a lower surface of a rotor of the electric motor and configured to cancel out unbalance of a force generated in the compression mechanism portion ; a refrigerant flow path configured to introduce a refrigerant gas discharged from a discharge port provided to the fixed scroll of the compression mechanism portion , to a bottom portion of the sealed container ; cup-shaped members respectively provided on the upper surface and the lower surface of the rotor of the electric motor and containing the balance weights ; a penetrating flow path through which the refrigerant gas containing a refrigerating machine oil flows from a lower side of the rotor of the electric motor through interiors of the cup-shaped members to an upper side of the rotor , wherein the penetrating flow path is provided so as to avoid the installation positions of the balance weights and extend through bottom portions of the cup-shaped members ; and a discharge cover provided at a lower portion of the frame , having an opening opposed to an opening of one of the cup-shaped members provided on the upper surface of the rotor of the electric motor , and configured to introduce the refrigerant gas having passed through the penetrating flow path , to a discharge pipe provided to the sealed container . a sealed container ; a compression mechanism portion provided within the sealed container and having a compression chamber in which plate-like scroll teeth of a fixed scroll and an orbiting scroll are meshed with each other to compress a refrigerant; an electric motor provided within the sealed container and configured to rotationally drive the orbiting scroll ; a rotary shaft configured to transfer a drive force of the electric motor to the orbiting scroll ; a frame configured to rotatably support the rotary shaft ; balance weights fixed to an upper surface and a lower surface of a rotor of the electric motor and configured to cancel out unbalance of a force generated in the compression mechanism portion ; a refrigerant flow path configured to introduce a refrigerant gas discharged from a discharge port provided to the fixed scroll of the compression mechanism portion , to a bottom portion of the sealed container ; cup-shaped members respectively provided on the upper surface and the lower surface of the rotor of the electric motor and containing the balance weights ; a penetrating flow path through which the refrigerant gas containing a refrigerating machine oil flows from a lower side of the rotor of the electric motor through interiors of the cup-shaped members to an upper side of the rotor , wherein the penetrating flow path is provided so as to avoid the installation positions of the balance weights and extend through bottom portions of the cup-shaped members ; and a discharge cover provided at a lower portion of the frame , having an opening opposed to an opening of one of the cup-shaped members provided on the upper surface of the rotor of the electric motor , and configured to introduce the refrigerant gas having passed through the penetrating flow path , to a discharge pipe provided to the sealed container . <EOS>