The interest for public administration service which is regarded as the service industry recently is increasing. This means that the value of customer satisfaction pursued from enterprise section in the past is broadly accepted as the goal of struggle for existence in both public and personal domain. But, it can be said that quality problem in public administrative service is remained if it regards as simple campaign for kindness The kindness is nothing but an one of facts which consist of satisfaction. In this paper, we develop the Lean model called LPAM(Lean Public Administration Model) to improve the public adminstration service in the base of acceptable methodology which is widely using in improvement. Also we examine that proposed model can work well as the improve process pursuing customer"s satisfaction and improvement of public administration service.