Objective: Extracorporeal shock wave therapy (ESWT) is a commonly used treatment modality in the treatment of epin calcanei. The aim of this study was to investigate the factors that were influencing the results of ESWT treatment on the patients with symptomatic calcaneal spurs. Material and Methods: 54 patients with symptomatic calcaneal spur who were administered ESWT treatment out of ninety--two patients who admitted to our clinic with heel pain were included in this study. The initial post treatment VAS scores, Roles and Maudsley score, age, height, body weight, body mass index, gender, calcaneal spur size (mm) of the patients were examined. The effects of gender, body mass index (BMI), age and spur length on efficacy of ESWT treatment have been investigated. Results: At the end of ESWT treatment, the VAS score and the Roles and Maudsley Pain Scale scores were significantly decreased (p < 0.001). On the other hand, there were no significant differences between subgroups in means of treatment efficacy (p> 0.05). In patients with symptomatic calcaneal spur, spur length was found to be moderately positively correlated with VAS score before treatment and one week after treatment. No correlation was found between other factors and clinical follow--up data (p>0,05).