Aim: The Milliken Activities of Daily Living Scale (MAS) is a self-report scale to address limitation of ability to perform daily tasks in upper extremity injuries. It can address the necessity of each task, which makes MAS useful while planning individual treatment. The objective of this study was to perform cross-cultural adaptation of the MAS TURKISH and to evaluate its reliability and validity for Turkish-speaking patients with upper extremity conditions. Method: A total of 99 patients were asked to complete the adapted MAS and DASH at baseline and one week after the initial assessment. Also grip strength was evaluated with an interval of one week. Results: The reliability of the adapted version was good, with high internal consistency (Cronbach's alpha = 0.964) and test-retest reliability (interclass correlation coefficient (ICC) = 0.772) for the total score. A statistically significant correlation between MAS and DASH scores and grip strength scores of the injured side was obtained. Conclusion: The results of the study have shown that the Turkish version of MAS has excellent test-retest reliability and validity. It is a suitable assessment for evaluating function and giving an overview of activity limitations in many performance areas in a Turkish population.