According to the 2007 Korea library yearbook, 162 out of 589 special libraries are one person libraries which means an individual librarian takes responsibilities of all librarian tasks. Due to its particularity and diversity, however, there is lack of research on special libraries compared to the other libraries and no job analysis for human resources to be effectively managed has been done. This study aims to understand the current status of one person library by investigating its tasks and frequency, importance, difficulty of its duties. This study also suggests plans to improve the job by analyzing its association with affiliated organizations of one person library.