A power conversion device includes low voltage terminals and high voltage terminals. The power conversion device includes: a voltage increasing operation unit increasing the voltage input to the low voltage terminals and outputting the increased voltage to the high voltage terminals, a voltage decreasing operation unit decreasing the voltage input to the high voltage terminals and outputting the decreased voltage to the low voltage terminals, and a control unit performing a temperature increasing operation to increase a temperature of a temperature increasing object, by causing the voltage increasing operation unit to perform a voltage increasing operation and the voltage decreasing operation unit to perform a voltage decreasing operation.