This study aims at analyzing librarians' job satisfaction at public libraries in Dae-gu, according to various management and employment styles. As a theoretical study, it discusses management styles of public libraries and argues concepts and factors of job satisfaction. Based on the discussion the study selects 7 factors of job satisfaction and conducts a survey. All the respondents are satisfactory to 4 factors; job, co-worker, superior officer, and business affairs, but are not satisfactory to 3 factors; wages, welfare, and employment. There are differences between contract managed libraries and direct managed libraries. At local government's contract managed libraries there is no difference in a sense of job insecurity between full-time and part-time librarians. The remarkable differences between full-time and part-time librarians are concerning participation in decision making processes and discretion in business affairs. The most significant differences between them are about wages, welfare and employment.