Using thermal analysis and mass spectrometry, this study examined samples of powdered pine bark by subjecting them to: (a) complete combustion, (b) partial combustion, and (c) pyrolysis. For each of the examined samples, which heated at the rate of 30 degrees C min(-1), temperature regions corresponded to moisture loss and the degassing process. Global and local maximum values of ionic currents representing H2O, CO2, CO, and additionally for hydrocarbons such as CH4, C2H4, and C2H5 for pyrolysis were identified. Based on the recorded values of ionic currents of hydrocarbons in the helium atmosphere, C2H5 dominance was determined at T415 degrees C, and CH4 dominance was determined at T>415 degrees C. Assuming first-order kinetics, thermogravimetric data were analyzed by the Arrhenius type model, and kinetic parameters were determined.