Kazimierz Tadeusz Opałek (13 July 1918 – 11 November 1995) was a jurist and philosopher of law, member of the Polish Academy of Sciences and the Polish Academy of Arts and Sciences, professor, head of the Department of Theory of State and Law at the Jagiellonian University from 1954 until 1988. He was dean of the Faculty of Law of the Jagiellonian University (1945–1956), editor-in-chief of and Studia Nauk Politycznych.

Biography He was the only son of Tadeusz and Eugenia née Polaczek. From 1928 until 1936 he attended the Bartłomiej Nowodworski Gymnasium in Kraków. He passed matura in 1936. Also in 1936 he started studying law at the Jagiellonian University. From 1938, while still a student, he served as deputy assistant and librarian at the Historical and Legal Seminar of the Jagiellonian University under Rafał Taubenschlag. He graduated in 1944 within underground education. He obtained master's degree in law in 1945.

In 1946 he obtained doctorate upon dissertation Hieronim Stroynowski jako filozof prawa. His doctoral students included Jan Woleński and Tomasz Gizbert-Studnicki. He was a member of the Polish United Workers' Party. He was the dean of the Law Faculty of the Jagiellonian University from 1954 to 1956.

He was buried at the Rakowicki Cemetery.

Works Co-authored with Władysław Wolter.

Co-authored with Jerzy Wróblewski. Co-authored with Jerzy Wróblewski.

Second edition: 1985.

Co-authored with Jerzy Wróblewski. Posthumously prepared by Ryszard Sarkowicz and Jerzy Stelmach. Posthumously prepared by Jan Woleński.

Accolades Medal of the 10th Anniversary of People's Poland (15 January 1955) Honorary degree of the University of Pécs

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