A portable teeth rinsing machine includes a base and a spray gun. The base includes an air compression device to generate compressed air and a liquid compression device to generate a compressed liquid. The spray gun communicates with the air compression device and the liquid compression device, and includes an air directing passage to get the compressed air, a liquid directing passage to get the compressed liquid, a first depressing portion located in the air directing passage and triggered to output the compressed air, and a second depressing portion located in the liquid directing passage and triggered to output the compressed liquid.
