The Central Library Brother José Otão (Portuguese: Biblioteca Central Irmão José Otão) is the main library of Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS), located in Porto Alegre, Brazil.

The Central Library had its origin in the collection located next to Rosário School in 1940, serving the Faculties of Economics, Philosophy, Social work and Law.

The physical space of the Central Library was expanded to an area of 21,000 square meters, through the integration of a tower of 14 floors to the old structure.

Academic research and knowledge production were significant increases of spaces equipped with microcomputers.

The Central Library serves the university community in the areas of education, research and extension, covering all areas of knowledge and contributing to their technical, scientific and personal, and some of their services offered also to the wider community.