A driving system for a railroad vehicle (1a,1b,1c) comprising: first electric power supply means for obtaining electric power from outside (18,36) of a vehicle; second electric power supply means for generating electric power inside of the vehicle: (15,16) third electric power supply means installed in the vehicle and having an electricity storage function: first electric power conversion means for converting electric power from the first electric power supply means to DC power at a first voltage value level; second electric power conversion means for converting electric power from the second electric power supply means to DC power at the first voltage value level; motor driving means for converting the DC power at the first voltage value level to AC power and driving a motor by the AC power; and electrified section judgment means (8a, 8b, 8c) for judging whether a section travelled by the vehicle is an electrified section in which electric power supply from outside of the vehicle is possible or a non-electrified section in which the electric power supply is impossible based on position information received from position information transmission means installed outside of the vehicle, wherein based on the judgment of the electrified section judgment means, in a case where the vehicle receives a non-electrified section prediction signal from the position information transmission means which is installed on an electrified section side relative to the start of the non-electrified section, the electric power conversion in the motor driving means and the first electric power conversion means are stopped, and in a case where the vehicle receives a non-electrified section confirmation signal from the position information transmission means which is installed on a non-electrified section, the electric power conversion in the second electric power conversion means is activated, in order to achieve disconnection from an external electric power source from the first electric power supply means during shift from the electrified section to the non-electrified section and in a case where the vehicle receives an electrified section prediction signal from the information transmission means which is installed on the non-electrified section side relative to the start of the electrified section, the electric power conversion in the motor driving means and the second electric power conversion means are stopped, and in a case where the vehicle receives an electrified section confirmation signal from the position information transmission means which is installed on the electrified section, the electric power conversion in the first electric power conversion means is activated in order achieve connection to the external electric power source from the first electric power supply means during shift from the non-electrified section to the electrified section. first electric power supply means for obtaining electric power from outside (18,36) of a vehicle; second electric power supply means for generating electric power inside of the vehicle: (15,16) third electric power supply means installed in the vehicle and having an electricity storage function: first electric power conversion means for converting electric power from the first electric power supply means to DC power at a first voltage value level; second electric power conversion means for converting electric power from the second electric power supply means to DC power at the first voltage value level; motor driving means for converting the DC power at the first voltage value level to AC power and driving a motor by the AC power; and electrified section judgment means (8a, 8b, 8c) for judging whether a section travelled by the vehicle is an electrified section in which electric power supply from outside of the vehicle is possible or a non-electrified section in which the electric power supply is impossible based on position information received from position information transmission means installed outside of the vehicle, wherein based on the judgment of the electrified section judgment means, in a case where the vehicle receives a non-electrified section prediction signal from the position information transmission means which is installed on an electrified section side relative to the start of the non-electrified section, the electric power conversion in the motor driving means and the first electric power conversion means are stopped, and in a case where the vehicle receives a non-electrified section confirmation signal from the position information transmission means which is installed on a non-electrified section, the electric power conversion in the second electric power conversion means is activated, in order to achieve disconnection from an external electric power source from the first electric power supply means during shift from the electrified section to the non-electrified section and in a case where the vehicle receives an electrified section prediction signal from the information transmission means which is installed on the non-electrified section side relative to the start of the electrified section, the electric power conversion in the motor driving means and the second electric power conversion means are stopped, and in a case where the vehicle receives an electrified section confirmation signal from the position information transmission means which is installed on the electrified section, the electric power conversion in the first electric power conversion means is activated in order achieve connection to the external electric power source from the first electric power supply means during shift from the non-electrified section to the electrified section.