Universitas Negeri Semarang (UNNES) has the vision to become a healthy, excellent, and prosperous international university in healthy, superior, and prosperous. To achieve its vision, the university has to develop human resources, including librarians as professionals in the field of libraries, documentation, and information. The efforts in developing the professionalism of librarians can be made by improving their competence. One of the concepts of developing library profession outlined by International Federation of Library Associations and Institutions (IFLA) is Continuing Professional Development (CPD). However, in general the implementation of CPD concept in library profession has not got much attention. The objective of the study is to find out the implementation of CPD concept in efforts to develop library profession at Semarang State University. Respondents consisted of 40 librarians, comprising those working at the main library (22 librarians) and at the departemental or faculty libraries. The study used quantitative method the result showed that (1) the librarians were not yet familiar with CPD concept; (2) UNNES Library has not implemented CPD concept in developing its professional librarians, (3) UNNES has not had a clear policy commitment in developing its professional librarians, (4) Continuous efforts have to be made in order to develop professional librarians at UNNES with the support of the university leaders.