The purpose of this study was to investigate factors affecting work performance among systems librarians in Korean academic libraries. The factors were divided into three categories: job characteristics, organizational characteristics, and individual characteristics.  
  Data from questionnaires were analyzed using the SPSS for windows. Multiple regression analyses were performed on three sets of variables related to the hypotheses of the study. The result of the analysis identified the following factors: Job characteristics which affect work performance among systems librarians in academic libraries are autonomy, task significance, skill variety, and feedback from supervisor. Organizational characteristics which affect work performance are job security, capability of automation systems, and co-workers. Individual characteristics which affect work performance are growth need strength, knowledge, and systems librarian experience.