PURPOSE: To generate a jamming wave efficiently by an equipment wherein the kind of the frequency or the like of a radar wave is discriminated by a receiver of a prescribed frequency, the knid of the radar wave is identified, the kind and data of the jamming wave are set in accordance with the data on a radar and the situation and a control is executed.

CONSTITUTION: A radar wave of a frequency 8-13GHz received by a receiving antenna is put in reception power amplification 2a of a receiver 26 subjected to power amplification and distributed in three by power distribution 2b. One radar wave is put in a radar wave detecting circuit 2c and the presence or absence of the radar wave is detected and determined. The data sent out from jamming information data 4c of a jamming wave generation control circuit 4 enter jamming wave information data 6a and are converted from digital into analog by jamming wave data 6b. Then, the data are sent out to any one of four jamming waves, a pulse jamming wave 6c, a continuous-wave jamming wave 6e, a frequency scan jamming wave 6f and a band noise jamming wave 6g, determined by determination 4b of the kind of the jamming wave. Next, the jamming wave thus determined is amplified and radiated into space through a transmitting antenna.