The aim of the study was to investigate the rate of methane emission from natural and drained peat soils, flooded with water in model experiment for predicting gas emission changes during renaturalization process. The subjects of study were peat soils taken from the Łęczyńsko-Włodawskie Lake District. The laboratory incubation was conducted in darkness for 126 days at room temperature. Each week the redox potential (Eh) and the pH of the collected solutions were measured, and gaseous samples were drawn in which CH4 and CO2 concentrations were tested. The maximal emission of CH4 (35.27 mg CH4 m-2 d-1) was observed for the drained peat soil after 76 days of incubation at Eh – 66.3 mV. Significant emission of CH4 was recorded after 34 days, from drained peat soil (14.77 mg CH4 m-2 d-1) and after 62 days (7.53 mg CH4 m-2 d-1) from natural peat soil. Significant correlation between methane emission and redox potential was found for both natural and drained peat soil.