Cooperation is one of the forms of impact having a significant impact on increasing the efficiency of the implementation of tasks by cooperating entities. It can result either from legal regulations as specific initiatives of specific entities, also taking the form of an agreement. The Police cooperation with the National Labour Inspectorate is the result of specific normative regulations and the concluded Agreement, which includes a wide range of topics. An analysis of the parties’ activities against the background of the concluded Agreement indicates appreciation of its provisions by the Police and the National Labour Inspectorate to ensure the rule of law in employment and in other matters to which it relates.