A power conversion device , comprising: a first current detector (R1); a second current detector (R2) connected between the first current detector and a first power supply terminal (AC1), a connection point (M) between the first current detector and the second current detector being a ground (GND) potential; a power factor correction circuit including: a coil (L1) having a first end connected to the first power supply terminal through the first and second current detectors connected in series, a first semiconductor switch (S1) with a first terminal connected to a second end of the coil, a second semiconductor switch (S2) with a first terminal connected to the second end of the coil, a first diode (D1) with a cathode connected to a second terminal of the first semiconductor switch and an anode connected to a second power supply terminal (AC2), a second diode (D2) with an anode connected to a second terminal of the second semiconductor switch and a cathode connected to the second power supply terminal, and a smoothing capacitor (C1) connected in parallel with the first and second diodes and connected between the cathode of the first diode and the anode of the second diode; and a control circuit configured to turn the first and second semiconductor switches on or off based on a current detection of the first current detector and a current detection of the second current detector. a first current detector (R1); a second current detector (R2) connected between the first current detector and a first power supply terminal (AC1), a connection point (M) between the first current detector and the second current detector being a ground (GND) potential; a power factor correction circuit including: a coil (L1) having a first end connected to the first power supply terminal through the first and second current detectors connected in series, a first semiconductor switch (S1) with a first terminal connected to a second end of the coil, a second semiconductor switch (S2) with a first terminal connected to the second end of the coil, a first diode (D1) with a cathode connected to a second terminal of the first semiconductor switch and an anode connected to a second power supply terminal (AC2), a second diode (D2) with an anode connected to a second terminal of the second semiconductor switch and a cathode connected to the second power supply terminal, and a smoothing capacitor (C1) connected in parallel with the first and second diodes and connected between the cathode of the first diode and the anode of the second diode; and a coil (L1) having a first end connected to the first power supply terminal through the first and second current detectors connected in series, a first semiconductor switch (S1) with a first terminal connected to a second end of the coil, a second semiconductor switch (S2) with a first terminal connected to the second end of the coil, a first diode (D1) with a cathode connected to a second terminal of the first semiconductor switch and an anode connected to a second power supply terminal (AC2), a second diode (D2) with an anode connected to a second terminal of the second semiconductor switch and a cathode connected to the second power supply terminal, and a smoothing capacitor (C1) connected in parallel with the first and second diodes and connected between the cathode of the first diode and the anode of the second diode; and a control circuit configured to turn the first and second semiconductor switches on or off based on a current detection of the first current detector and a current detection of the second current detector. <EOS>