This article is aimed to explore the interpersonal communication of library professionals in library service. Satisfaction of library users and the correlation interpersonal communication of library professionals to the satisfaction of library users of library service. This research used quantitative research method. The data collecting technique used observation, questionnaire, and documentation. The population in this research consists of library service patrons (N=4166), then it is taken patrons for sampling (n= 99). The chosen sampling technique used a simple random sample, while data measurement used the Likert scale. The validity test applied the product- moment correlation formula, while the reliability test uses the Alpha Cronbach formula. The result shows that interpersonal communication of library professionals in library service belongs to high category. The satisfaction of library users in library service is in the high class. There is a positive correlation between the interpersonal communication of library professionals and the joy of library users in library service.
Keywords: Interpersonal Communication, Questionnaire, library professionals, quantitative method
