Service quality is one of the most important subjects in marketing studies. Literature review shows that this variable is related to many important variables in marketing area. However, there is always this question of which components of service quality are better predictors for satisfaction and future intention of customers. The data gathered by three standard questionnaires: 1- service quality questionnaire of Lio 2- customer satisfaction questionnaire of Oliver; and 3- future intention of customer questionnaire of Lim .350 questionnaires were analyzed that gathered by used of multi-stage sampling among customers of body building clubs from Fars province. Results indicated that between, reliability showed the most of impact on customer satisfaction, while the empathy showed the lowest impact on customer satisfaction. Results, also, indicated that between, reliability and intangibility were respectively showed most of and lowest impact on future intention of customers