This bachelor thesis is aimed at diversity of macrofungi growing in ectomycorrhizal symbiosis with introduced species of woody plants. The research was realized at six research plots of introduced woody plants in the Borová hora Arboretum in Zvolen. The thesis contains basic knowledge about mycorrhizal symbiosis and ecology of fungi, representation of individual tree stands, overview and photodocumentation of recorded fungal taxa and ecological notes of their occurrence and possible mycorrhizal partners. In connection with this issue, some ectomycorrhizal species found in Slovakia close to introduced trees, especially under pines and Douglas-fir, are mentioned. A part of the thesis is also the key for determination of the recorded fungal species in this research.