Undang-undang Tubuh Negeri Johor, or Johor State Constitution (Jawi script: اوندڠ-اوندڠ توبوه نڬري جوهر) was the state constitution of Johor, promulgated on 14 April 1895 by Sultan Abu Bakar. The contents of the constitution covers many aspects:
Since 1895, the Johor State Establishment Constitution was revised 4 times:-
Undang-undang Tubuh Negeri Johor played a major role for the Malays during their opposition against the formation of Malayan Union. The key factors of their protest were because all Sultans of Malay states would lose their power as the ruler of their respectable states, and the way Sir Harold MacMichael threatened the Sultans for their signatures.
Sultan Ibrahim of Johor himself was encouraged by MacMichael to sign on the treaty, sparking anger among Malays, claiming that signing the Malayan Union treaty violated the Undang-undang Tubuh Negeri Johor which disallowed the Sultan of Johor from performing actions that might threaten the sovereignty of Johor. As a response of the protest, he hosted the first UMNO's first general assembly at his palace in Johor Bahru on May 1946. He also joined the boycott of the installation of Malayan Union's first governor.
Due to the success of the Malayan Union protest by the Malays, rulers of other Malay states began using Undang-undang Tubuh Negeri Johor as a model for their own constitutions in order to protect the sovereignty of Malay states.