In order to provide a medical device having a power supply means making it possible to avoid the risk of running out of battery, a medical device is equipped with a medical device main body and a first battery pack for power supply provided detachably from the medical device main body, the first battery pack has a power receiving coil for receiving magnetic field generated by a power transmission coil provided on a power transmission side, and a secondary battery charged based on the power received by the power receiving coil, and the battery pack is configured to be chargeable without contact even when detached from the medical device main body.