A novel and simple method have been developed for t he synthesis of some Pyrazoline derivatives under microwave irradiation. In addition, these com pounds were obtained with conventional heating procedures to compare them with those obtai ned with microwave irradiation. All the compounds synthesized were characterized by running TLC, Elemental analysis, IR, NMR and MS spectra. Consequently, the microwave irradiation method provided nearly the same or higher product yields in a very short period of tim e. These results suggest that the microwave irradiation method was more useful than the convent ional method due to shorter reaction time and energy savings.