A railway vehicle for travelling on a route with an overhead contact line and on a route without an overhead contact line, the vehicle being provided with a drive system comprising: a first power conversion device (21, 22; 21, 23; 21, 24) that converts AC power to DC power; and a second power conversion device that drives an electric motor by using the DC power converted by the first power conversion device as a power supply, wherein: the first power conversion device is connected, through a first contactor (12; 14), to a first AC power supply that supplies a single-phase alternating current and connected, through a second contactor, to a second AC power supply that supplies a three-phase alternating current, and the first power conversion device performs a power conversion operation according to the AC power supplies connected to the first and second contactors, wherein: the drive system is configured, when an AC side of the first power conversion device is switched from the first AC power supply to the second AC power supply, to perform: a first step of terminating a switching operation of the first power conversion device to open the first contactor; a second step of closing the second contactor to start a switching operation of converting the three-phase alternating current to a direct current by the first power conversion device; and a third step of permitting torque output from the electric motor. a first power conversion device (21, 22; 21, 23; 21, 24) that converts AC power to DC power; and a second power conversion device that drives an electric motor by using the DC power converted by the first power conversion device as a power supply, wherein: the first power conversion device is connected, through a first contactor (12; 14), to a first AC power supply that supplies a single-phase alternating current and connected, through a second contactor, to a second AC power supply that supplies a three-phase alternating current, and the first power conversion device performs a power conversion operation according to the AC power supplies connected to the first and second contactors, wherein: the drive system is configured, when an AC side of the first power conversion device is switched from the first AC power supply to the second AC power supply, to perform: a first step of terminating a switching operation of the first power conversion device to open the first contactor; a second step of closing the second contactor to start a switching operation of converting the three-phase alternating current to a direct current by the first power conversion device; and a third step of permitting torque output from the electric motor. the first power conversion device is connected, through a first contactor (12; 14), to a first AC power supply that supplies a single-phase alternating current and connected, through a second contactor, to a second AC power supply that supplies a three-phase alternating current, and the first power conversion device performs a power conversion operation according to the AC power supplies connected to the first and second contactors, wherein: the drive system is configured, when an AC side of the first power conversion device is switched from the first AC power supply to the second AC power supply, to perform: a first step of terminating a switching operation of the first power conversion device to open the first contactor; a second step of closing the second contactor to start a switching operation of converting the three-phase alternating current to a direct current by the first power conversion device; and a third step of permitting torque output from the electric motor. the drive system is configured, when an AC side of the first power conversion device is switched from the first AC power supply to the second AC power supply, to perform: a first step of terminating a switching operation of the first power conversion device to open the first contactor; a second step of closing the second contactor to start a switching operation of converting the three-phase alternating current to a direct current by the first power conversion device; and a third step of permitting torque output from the electric motor. a first step of terminating a switching operation of the first power conversion device to open the first contactor; a second step of closing the second contactor to start a switching operation of converting the three-phase alternating current to a direct current by the first power conversion device; and a third step of permitting torque output from the electric motor.