The selection of mycorrhizal fungi forming a symbiotic association with trees growing in areas contaminated with heavy metals was observed. The aim of this study was to discover how ectomycorrhizal fungi, growing in habitats with high levels of heavy metal contamination, are adapted to this contamination in comparison with fungi that grow in nonpolluted environments. The experiments were performed using a vegetative mycelium isolated from fruiting bodies in clean cultures on agar. Changing concentrations of zinc, cadmium, and lead in the growth medium, the growth of mycelium cultures of Xerocomus badius and Amanita muscaria was observed and compared. It was found that strains of Amanita muscaria and Xerocomus badius growing in contaminated areas were adapted to high concentrations of Zn, Cd, and Pb. The degree of adaptation was related to the level of contamination of the area where this mycorrhizal fungus survived.