The Institute of Legal Sciences conducts research on the following prowinces of law:
- Roman Law (influence of Roman law over canon law; Roman penal law; Roman law in Poland in the 19th C.; status of a physician in Roman law; Roman law in the writings and activities of the Church Fathers)
- American and Comparative Law (comparative approach to various aspects of the US and Polish constitutions)
- History of State and Law (history of Polish political system and law after 1918; history of political systems and laws of the USA, Great Britain and Ukraine; legal status of non-Catholic churches and other denominational unions in the Polish-Lithuanian Commonwealth; Polish penal law before 1795)
- Human Rights (legal systems of protection of human rights; universal, European and supranational system of protection of human rights; subjective rights)
- Philosophy of Law (European philosophy of law; Chinese philosophy of law, Japanese philosophy of law; Korean philosophy of law; idea of law; axiology of law; methodology of legal sciences; analytical philosophy of law; French and German philosophy of law)
- Civil Law (application of similar law in labour agreements; matrimonial regime; cooperative law; inheritance law; civil law in environmental protection; purchase of property by foreigners; agreements in banking and insurance system; bankruptcy law and recovery proceedings; aspects of public law and private law as related to banking law; real property trading; damage and indemnity)
- Civil Procedure (influence of penal proceedings over civil proceedings; general theory of a lawsuit; jurisdictional activity of courts in civil cases)
- Commercial Law (key issues of Polish commercial companies law; trade agreements and trade marks in the European Union law; elements of civil law in commercial law; construction and operation of corporations under private law with a special focus on commercial companies)
- Labour and Social Insurance Law (collective agreements under labour law; re-codification of labour law; protection of labour agreements in comparative analysis; doctrine of employment-at-will in the USA; legal costs in labour law actions)
- Constitutional Law (constitutional foundations of political system; foundations of the independence of the judiciary; democratic state of law and its sovereignty)
- Administrative Law (axiology of administrative law; decentralisation of public administration; personal data protection law; access to public information; antitrust law; press law; intellectual property law)
- Finance Law (public finances; tax law system; selected problems of Polish and international tax law; adjustment of Polish tax regulations to the European Union standards)
- International Public Law (problems of international environmental law; protection of human rights; diplomatic and consular law; international legal aspects of Polish co-operation with neighbouring states; sources of international law)
- Law on Religion (freedom of thought, conscience and religion; legal situation of churches and other denominational unions in Polish law including the aspects of comparative law; influence of Community law on Polish ecclesiastical law)
- Criminal Law (protection of life and family and penal law; science of penalty; legal situation of minors; changes in penal law necessitated by the progress of biomedicine; penal law and combating terrorism; penal law of the People's Republic of Poland; Professor Juliusza Makarewicz's legal ideas)
- Medical Law and Forensic Medicine (the rudiments of forensic medicine; selected problems of medical law; doctors liability in a Ukrainian law)
- Negotiations and Mediation (competences of a lawyer as a negotiator or mediator; areas of negotiation and mediation provided by law; conditions of negotiation and mediation process)
- Criminal Procedure and Forensic Science (Europeanization of Polish penal proceedings, in particular developing new mechanisms for co-operation of the judiciary and the police in penal actions in the European Union)