Library has social and education functions. The existence of South Jakarta public library cannot be separated from these functions. On the other hand, the reading habit of people need to be improved. The problems to be investigated thus center on the role of the public library in improving the reading habit of society. This research tries to explore the role of public library in improving the reading habit of society. In compliance with survey method emphazising on descriptive analysis, this research studies 232 respondents. The result of the study indicates that statistically significant influences apply on the role of public library in improving the reading habit : for each variables (X,) 0.022