en تخصصي Special پژوهشي Research <strong>Background:</strong> Welding industry is one of the most dangerous industries in the world. Because of the nature of their jobs, welders are exposed to serious injuries. The present study aimed to investigate the effective factors on the use of respiratory protection devices in welding workshops.<strong> Methods:</strong> In this cross-sectional study, 180 welders were studied in Gonabad city. A respiratory protection inventory was used to investigate the effective factors on the use of respiratory protection devices based on the health belief model in welders. Data were analyzed using SPSS software.<strong> Results:</strong> The working hours were 1.39 (8.25, the respiratory protection score was 10.12 (91.25). In this study, which was carried out on 180 people, there was a significant correlation between the score of respiratory protection and marital status and working shift. However, there was no significant relationship between respiratory protection score and the level of education and type of employment.<strong> Conclusion: </strong>The results of this study revealed that the respiratory protection score in the studied welders is moderate and should be considered by managers and the relevant authorities Personal protective equipment, Inhalation welding, Occupational health 70 74 http://aoh.ssu.ac.ir/browse.php?a_code=A-10-28-11&slc_lang=en&sid=1 Ali Firoozi Chahak No MSc Faculty Member, Dept. of Occupational Health, Faculty of Health, Gonabad University of Medical Sciences, Gonabad, Iran Mohammad Javad Fani No MSc Faculty Member, Dept. of Occupational Health, Faculty of Health, Gonabad University of Medical Sciences, Gonabad, Iran Ali Akbar Alinaghi Langari aliakbarlangari@yahoo.com Yes Faculty Member, Dept. of Occupational Health, Faculty of Health, Bam University of Medical Sciences, Bam, Iran Mohammad Hossein Beheshti No Faculty Member, Dept. of Occupational Health, Faculty of Health, Bam University of Medical Sciences, Bam, Iran