Abstract: A dish washer for commercial use is provided. The dishwasher according to current application is used for restaurants, hospital, school and military camp, etc. The dish washer of the current application has an auxiliary rinsing water pipe that is embedded inside of a washing water pipe. The rinsing water supplied to the washing water pipe drives the remaining soapy washing water out of an upper washing water impellor just after the washing step is finished. In rinsing step, rinsing water is supplied to an upper rinsing impellor via main rinsing water pipe. Rinsing water is sprayed to the bottom of the washing water impellor to remove the residual soapy washing water droplets. The dish washer of the current application removes a chance of contamination of dishes and cups by soapy washing water drops after washing is finished.