The concept of productivity has been analyzed for more than two hundred years, though only in the manufacturing sector. The concept of productivity in the service sector was not analyzed before the end of the twentieth century and only a few resources have been detected after comprehensive literature analysis concerned with research topic. These literature resources provide the analysis of productivity service in specific service sector spheres. Nachum (1999) analyzed issues of productivity measures of consulting firms, while Gupta (1995) in health-care environment. Regarding the level of the problem analysis, it is important to render a conceptual analysis of service sec- tor productivity. Lithuanian researchers have not done such researches and the concept of productivity was analyzed only in the manufacturing sector. These reasonings illustrate scientific novelty.