Over time, changes in the way in which humans have been treating animals have become evident, however this relationship is far from being the ideal way of treating them. To ensure that animals and humans live harmoniously, the United Nations Educational, Scientific and Cultural Organization (UNESCO) and specialized agencies of the United Nations (UN) created the Universal Declaration of Animal Rights, where they aimed to defend the right of animals to a dignified life, without mistreatment or exploitation. From that moment on, Brazil developed and has been developing legislation aimed at protecting animals, which recognizes that animals not only have their rights, but it is also the duty of human beings to ensure that they are treated equally, guaranteeing access to these rights and respect for their freedoms. This work aims to provide a history of animal protection laws, with an emphasis on the first decrees and the advancement of current legislation.