The article discusses the privileges and immunities of members of the institutions and organs of European Communities in relation to the provisions of the Code of Criminal Procedure. In this context, the author presents the impact of non-liability and inviolability privilege for the possibility of initiation of criminal proceedings, for continuation of the proceedings already initiated, and for making judicial decisions. The type and extent of protection of the immunities and other privileges applicable to Members of the European Parliament, judges of the European Court of Justice and the Court of First Instance, advocates general, members of the Court of Auditors, employees of the European Investment Bank and the European Central Bank, members of the Council of the European Union and the European Council. There were also discussed the immunities which may be lifted, and the procedure under which a public prosecutor should be granted a consent for the prosecution, as well as organs empowered to lift a given type of immunity. The article was based on the existing provisions of European law in conjunction with national legislation 'stricto sensu' of the Republic of Poland and jurisprudence of the European Court of Justice and the International Court of Justice. In the final part of the article the proposals 'de lege ferenda' with respect of desirable changes concerning the above-mentioned privileges and immunities.