This study investigated the librarians involvement in the protection of copyright in Nigeria. The study adopted a descriptive survey design. Questionnaire was the primary tool used for data collection. The study population consisted of 63 professional librarians from the five selected universities in Ogun State. A total of 49 questionnaires were retrieved out of 63 administered and given a response rate of 77.8%. It was found that librarians are aware of the provisions of copyright law and take some measures to prevent its infringement. It was recommended among others that librarians should be more intentional in ensuring that copyright is not violated in the library by engaging all the available measures to ensure compliance.