The Author examines the relationship between transformation in the service sector and Italian Labour Law. After having pointed out that the main transformation regards the introduction of the market in the Italian services sector, he hypothesizes that Labour Law is losing its original characteristic of «antagonist law». Under these circumstances, however, the Author thinks ít is necessary to develop a new legal framework for Trade Union action in the ter-tiary and a new approach to the problems of unemployment deri-ving from changes in the services sector.