The transesterification of vegetable oil in microwave environment is one of the latest methods of obtaining biodiesel but it is not investigated sufficiently. According to literature data, the treatment with microwaves reduces activation energy of transesterification reaction, thus efficiently reducing reaction time. The research of kinetics of methanolysis reaction of rapeseed oil in 50 and 60ºC temperature, using reagents proportions of 4.0 moles of methanol per 1 mole of oil and catalyst (NaOH) of 0.45% of the oil weight, showed that the speed of the reaction depends on temperature but doesn't depend on the heating method - convection or microwave heating.