Respecting the principles of analytics, systematization and comprehensiveness, the paper deals with the frames of disparity between supply and demand in services market. The basic reasons for disparity are systematically divided into five groups: (1) reasons for problems in the area of information on supply and demand, (2) reasons for problems in the area of parallel functioning of the gray market, (3) reasons for problems in the area of psychological conditions and perceptions of consumers, (4) reasons for problems in the area of social and economic situation, (5) reasons in the area of institutional functioning. These groups contain reasons of the general character and reasons in individual areas and flows. The analysis of disparity has been conducted via relevant relations of demand and supply that exist in services market, as follows: (1) the relation of supply of services provided by companies towards adequate forms of demand (other companies, institutions, population), (2) the relation of institutions' supply of services toward adequate forms of demand (all companies, population) and (3) the relation of unofficial supply of services toward adequate demand (population). Within basic prerequisites for the solution to disparity of demand and supply in the service sector, we have especially emphasized and analyzed personnel potential. We have analyzed elements and problems of the labor market, available personnel potential (personnel potential of the employed and the unemployed), as well as latent personnel potential.