Arbuscularmycorrhizae (AM) are important for plant growth and nutrition since they increase mineral influx. Mycorrhizal association plays a key role in the sustainability of terrestrial plant ecosystems, in particular those presenting limitations for the establishment and subsequent growth of plants. However, symbiosis efficiency is affected by many environmental factors. Studies conducted on the number of mycorrhizae in volcanic soils are very limited around the world and there are not any studies conducted in Iran. For this purpose, a study was carried out on soils with volcanic material in northwest of Iran. In this study, 21 horizons were defined in four different profiles with andesitic parent material. The total number of mycorrhizae existing in the horizons determined in a total of 4 profiles, that two of them located in pasture and two in garden areas. It was found out that the number of spores in garden areas was more than the number of spores in pastures. This was attributed to the fact that the existence of plant roots in garden areas was higher compared to pastures. In each profile, the highest number of mycorrhizal spores was obtained from different depths of horizon A, where ventilation is high, and the number of mycorrhizal spores showed a decrease as the depth increased. The correlation carried out in the study also revealed a negative relationship between the number of spores and horizon depth for all values and a positive relationship between the number of spores and organic matter.