Air pollution is one of the most recent and important environmental concerns. The health of millions of people is affected by the detrimental impacts of air pollution every year. The portion of soot or black carbon pollutant in this regard is so high that it can be a significant contributor to death rates or dangerous diseases that could lead to human fatality. Since means of transportation and traffic factors are the most major elements in variation of soot concentration, this study aims to measure the amount of soot pollutant in low and high traffic environments over 3 hour periods in Kermanshah city by using Particle Soot Absorption Photometer. The soot concentrations in the urban background (low traffic) for three different days was 0.086, 0.079, and 0.072 μg/m3 respectively, and in the street level (high traffic) for two different days were calculated at 1.09 and 0.42 μg/m3.