Cooperation between enterprises is the basis for local clusters' existence and developments. Local clusters are some of the tools which support performance and competitiveness. This article analyses the influence of the existence of a cluster in the packaging industry on the financial performance of its member companies. This paper addresses the impact which the membership of some enterprises in a cluster could have on their financial performance. The research file consists of founding enterprises from the Packaging Manufacturers Cluster. Enterprises that create the core of the cluster do business in industries with the following statistical classifications: CZ-NACE 162400, 172100 and 222200. ROE, ROA and EVA/sales indicators were used as a criterion for evaluating financial performance. For the assessment of financial performance the Malmquist index is applied with two inputs and one output. The aim of the research was to verify the statement that business entities' membership in the local cluster translates into improved financial performance in a time series. The research has shown an improvement in financial performance in companies in the local cluster.