The intention of this study was to determine which domain of employment relationship quality best influences workplace climate of librarians. Through non-experimental quantitative research design utilizing descriptive correlational technique and applying the mean, Pearson r, Regression analysis as statistical tools, and 140 librarians were chosen as respondents through the universal sampling technique. The researcher used the employment relationship quality and workplace climate questionnaire. The study revealed a high level of employment relationship quality in terms of fairness and trust. The level of workplace climate was also high in terms of control, support, communications, change, coping, rewards, and resilience. There is an overall significant relationship between employment relationship quality and workplace climate of librarians. Among the indicators of employment relationship quality, trust was the domain which best influences workplace climate.