The aim of the paper was to determine the effect of soil pollution with polycyclic aromatic hydrocarbons (PAHs) on the content of carbon, nitrogen and the share and content of dissolved organic carbon (DOC) and dissolved nitrogen (DNt). The study was carried out based on soil samples (Luvisols, Phaeozems, Haplic Arenosols, Fluvisols) representative of the Kujawsko-Pomorskie Region.Soil samples were polluted with selected PAHs (fluorene, anthracene, pyrene and chrysene), in the amount corresponding to 10 mg PAHs kg⁻¹. The PAHs-polluted soil samples were incubated for 120, 180 and 360 days at the temperature of 20-25°C and fixed moisture (50% of field water capacity). In the soil samples prior to and after incubation the following were determined: the content of total organic carbon (TOC), and total nitrogen (Nt), as well as the content and share of DOC and DNt. It was shown that soil pollution with PAHs (anthracene, fluorene, pyrene, chrysene), in general, did not result in significant changes in the content of TOC and Nt. The content and share of dissolved organic carbon and nitrogen is characteristic for a given soil. The pollution of soils with PAHs disturbs the balance, resulting in temporary changes in the content and share of soluble organic matter throughout the incubation of the soil material polluted once with selected PAHs.