The adoption of the UE Directive on Open Data and Re-use of Public Sector Information gives rise to necessity of its implementation by the Member States of the European Union. The process of implementing the Directive in Poland has also a significant constitutional value, because - according to the authors of this article - its content is realization of the principle of the common good (Article 1 of the Constitution of the Republic of Poland: “The Republic of Poland shall be the common good of all its citizens”). This is because data sharing has not only economic value, allowing the entity using access to public information to achieve a financial benefit, but also in other areas, where, in principle, both parties (a person and public authority) benefit from such action. Therefore, the role of public authorities should be to ensure the widest possible access to public sector information in order to implement the constitutional principle of the common good.