Abstract: An oral cleaning device includes: a wash water production tank in which wash water to be fed into an oral cavity is produced and stored; a water feed mechanism including a water feed channel having one end connected to the wash water production tank, a carrier configured to carry the wash water in the wash water production tank into the water feed channel, and a release unit connected to an outlet end of the water feed channel to release the wash water into the oral cavity; and an electrical discharge generator which includes a pair of electrodes for inducing streamer discharge in water, and a power supply configured to apply a voltage to the pair of electrodes, and is configured to produce hydrogen peroxide in the water by the streamer discharge.

Abstract: A medical device cleaning device includes a washing tank, and an electrical discharge generator. An endoscope to be cleaned is housed in the washing tank, and immersed in wash water. An electrical discharge unit of the electrical discharge generator is placed in the washing tank, and immersed in the wash water. A direct-current power supply is connected to a pair of electrodes of the electrical discharge unit. When the direct-current power supply applies a voltage to the pair of electrodes, streamer discharge is performed between the pair of electrodes to produce hydrogen peroxide. The endoscope is sterilized in the washing tank by using the hydrogen peroxide produced by the streamer discharge.