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Introduction: Nail extension is a profession which is entered Iran recently and is expanding vastly. Every profession has its own harmful effects therefore working in nail salons regarding to awkward posture while nail services and equipment and tools which use in this profession makes nail technician face to Ergonomic risk factors. This study was conducted to evaluate the ergonomic status of nail workers in Sabzevar Methods: This descriptive-analytic study was done among nail workers in beauty salons. Nordic questionnaire was used to determine incidence of muscoloskeletal disorders and novel Ergonomic Pos-tural Assessment (NERPA) method utilize in order to evaluate body posture. Also local lighting of the work surface was measured to determine its association with muscoloskeletal disorders. Data were analysed using SPSS 17. Results: The prevalence of pain in neck (63.8%), upper back (51.3%), waist (42.5%), shoulder (41.3%) and wrist (6.37%) has the highest value Body posture assessment using NERPA method also showed in all cases (100%), the final score was reached at the highest level (score 7 and the need for immediate change). In addition the intensity of local lighting was lower than the mandatory OEL level of Iran (53.19%) Conclusion: As the finding indicated, nail services as a unknown job and therefore lack of knowledge about this profession and also inadequate monitoring by occupational hygiene inspectors cause high incidence of muscoloskeletal disorders among nail workers, therefore in order to reduce these complications, health care organizations should pay more attention to establish roles and standards.