The present invention relates to an oral cavity cleaning device. The oral cavity cleaning device may include an air injection portion that injects high pressure air a cleaning liquid tank that cleaning liquid is stored therein an acceleration portion that is connected to the cleaning liquid tank through a first pipe body and is connected to an air injection portion through a second pipe body, and draws out cleaning liquid form the cleaning liquid tank by pressure difference and injects this, if high pressure air is supplied from the air injection portion a nozzle portion that is connected to the acceleration portion by a pipe body and makes the cleaning liquid injected by high pressure air be injected to a tooth and a switching portion that controls the air injection portion to reduce, increase injection amount of cleaning liquid, or stop the cleaning liquid.
