This study aims at determining: 1) the level of quality of library services at SMAN 1 Taliwang, 2) the level of student satisfaction with library services at SMAN 1 Taliwang, and 3) the effect of library services on the level of student satisfaction at SMAN 1 Taliwang. The research approach used quantitative methods with ex-post facto research types. The research sample totaling 100 students was determined by stratified random sampling technique. Data collection techniques using questionnaires and data analysis using simple regression analysis. The results showed that: 1.) Of the 3 categories of library services that students liked more, namely circulation services. The results of an analysis of Library Services showed that 39% of students gave a "good" rating, 59% gave an "enough" rating, and 2% gave a "poor" rating. 2.) The results of the analysis of student satisfaction are in the medium category. The results of the categorization showed that 32% gave a high rating, 67% gave a moderate rating, and 1% gave a low rating. 3.) The results of the regression analysis show that: a.) There is a significant correlation between X and Y; b.) The regression equation obtained is Y = 1.363 + 0.524(X); c.) The regression model is a significant model based on the F-count value of 53.17 and a significance level of 0.000, d.) The effect of X and Y is a significant effect based on the t-count value of 7.292 and a significance level of 0.000; and e) The influence of X on Y is 35.2%. 
                        
                        
                        
                        
                            
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