Background: Patient-reported questionnaires offer valuable tools that can be used in clinics and research to determine the effectiveness of treatment. The aim of this research was the translation, cross-cultural adaptation and validation of the Back Pain Functional Scale (BPFS) into Arabic. Methods: According to standardized guidelines, the translation and adaptation of the scale was completed. Two panels of experts were asked to review the instrument for consistency and to evaluate all the elements of the scale for content relevance. A convenient sample of 65 patients complained of LBP, completed BPFS and recompleted it to test-retest reliability after 2 days.Results: The Arabic adapted version of the BPFS was produced and validated. The scale index of clarity was 99%. Index of Content Validity (ICV) = 98.3%. The Cronbach'α coefficient for internal consistency was 0.865. The Total score of Spearman's correlation coefficients is 0.878. Conclusion: The BPFS presented excellent reliability and validity for assessing the functional status in Arabic speaking patients with LBP.