Introduction. This study aims to find out how the quality of library services at SMA Negeri 7 Purworejo and what attributes are important to be allocated by library managers in order to provide good service quality based on the LibQUAL+^TM theory which includes (1) Service Affect (the ability & attitude of librarians in serving), (2) Library aas Place (library room facilities & atmosphere), (3) Personal Control (directions and means of access), (4) Information Access (access to information). Data collection method. The method used in this study is a quantitative method. With a sample of 251 people, the sample was drawn using a simple random sampling technique, namely a random sampling technique without regard to the existing strata in the population. Analysis data. The analysis was carried out using the Importance Performance Analysis (IPA) model, namely the analysis of the level of interest and user satisfaction using a Cartesian diagram which can show the location of the indicators in the LibQUAL+^TM dimension contained in the first quadrant. Results and discussion. The results of this study indicate that the quality of library services at SMA Negeri 7 Purworejo is 8471 ,66% or 80% more, meaning that the users are satisfied with the performance of library services. Conclusions. Users have high expectations of smooth access to the information needed, with an average of quadrant I and III positions.