Environmental noise is a known stress, which induces alterations of various physiological responses in individuals exposed to it. The aim of the present study was to assess the effects of industrial noise on the cardiovascular system of workers exposed to industrial noise in lock factories. The study group included 114 workers employed in different sections of lock factories exposed to industrial noise levels exceeding 80 dB. The control group consisted 30 people who never lived or worked in a noisy environment. The results of this study showed significant changes in systolic blood pressure, diastolic blood pressure, mean arterial pressure, pulse pressure and heart rate in the workers of lock factories. So this indicates that industrial noise could be possible contributing factor in the development of arterial hypertension.