The aim of this research is to analyze the support policies and the collective efficiency in a furniture cluster in the South region of Brazil, subject of scarce studies despite its importance. Using quantitative methodology we made a survey with 20 companies of this furniture cluster. The results indicated that support policies and collective efficiency were statistically correlated. The contribution of this paper to the literature is to reinforce that the findings that support policies are a way to improve collective efficiency, and so provide competitiveness to all the companies that belong to the cluster. This research was made on a temporal transversal cut, a characteristic of studies in networks, so the result does not allow generalizations.