A power supply device configured to be mounted aboard an electric powered vehicle, comprising: a power storage device for storing electric power input/output with respect to an electric motor generating vehicle driving power, a power line (ACL1, ACL2) connected to an external power supply during external charging, a power converter for executing bidirectional power conversion between AC power of said power line and DC power input to and output from said power storage device, an outlet electrically connected to said power line and configured to output AC power supply, said outlet being connectable to an electric load, and a control device for controlling DC power input to and output from said power storage device by said power converter, and a power detector configured to detect power consumption of the electric load; the power supply device being characterized in that the power supply device comprises a power detector configured to detect output power (Po) outputted by the power converter; said control device is configured to execute temperature-rise control, in an event of a temperature of said power storage device being lower than a predetermined temperature (Tthl, Tth2) when said external power supply is connected to said power line, and said electric load is connected to said outlet, by alternately causing a first state where electric power (Po) outputted to said power line (ACL1,ACL2) by said power converter is controlled such that power consumption of said electric load is ensured by the electric power (Po) supplied by the power converter by discharging of said power storage device, and a second state where electric power (Po) inputted to said power storage device by said power converter is controlled such that power consumption of said electric load is ensured in association with charging of said power storage device; wherein said control device is configured to control said power converter such that electric power discharging from said power storage device in said first state is equal to power consumption of said electric load. a power storage device for storing electric power input/output with respect to an electric motor generating vehicle driving power, a power line (ACL1, ACL2) connected to an external power supply during external charging, a power converter for executing bidirectional power conversion between AC power of said power line and DC power input to and output from said power storage device, an outlet electrically connected to said power line and configured to output AC power supply, said outlet being connectable to an electric load, and a control device for controlling DC power input to and output from said power storage device by said power converter, and a power detector configured to detect power consumption of the electric load; the power supply device being characterized in that the power supply device comprises a power detector configured to detect output power (Po) outputted by the power converter; said control device is configured to execute temperature-rise control, in an event of a temperature of said power storage device being lower than a predetermined temperature (Tthl, Tth2) when said external power supply is connected to said power line, and said electric load is connected to said outlet, by alternately causing a first state where electric power (Po) outputted to said power line (ACL1,ACL2) by said power converter is controlled such that power consumption of said electric load is ensured by the electric power (Po) supplied by the power converter by discharging of said power storage device, and a second state where electric power (Po) inputted to said power storage device by said power converter is controlled such that power consumption of said electric load is ensured in association with charging of said power storage device; wherein said control device is configured to control said power converter such that electric power discharging from said power storage device in said first state is equal to power consumption of said electric load.