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Background and aim: The goniometric measurement is a simple and common method for assessment of movements and joints in the rehabilitation clinics that the survey of sensitivity and reliability level has an important role for the therapists.  The aim of this study was to investigate inter-rater reliability of goniometric measurements of the pronation and supination movements
Material and methods: In this descriptive cross-sectional study twelve healthy student boys were participated.  The candidates were asked to sign an informed consent.Goniometric measurements were carried out by the two experienced physiotherapists to assess the forearm supination and pronation. The dominant limb was evaluated in supine position during the test. The correlation coefficient test was used for inter rater reliability.
Results: The coefficient correlation was high between the two raters, (for supination, r=0.931 and for pronation r=0.875).  The results showed that the coefficient correlation of supination was higher than pronation.
Conclusion: The results of the study indicated that the inter-rater reliability of goniometric measurements of the pronation and supination movements were high, also  the level of reliability for supination was higher than pronation.