PROBLEM TO BE SOLVED: To obtain an effective generation amount of minus ions corresponding to the number of discharge electrodes by using a plurality of discharge electrodes.SOLUTION: A minus ion generation device comprises: a device body including a ventilation passage 5； needle-like discharge electrodes 14 which are provided in the ventilation passage of the device body； ventilation means which makes air flow to the ventilation passage of the device body； high voltage generation means which applies a high voltage for discharge to the discharge electrodes； and ground electrodes 15 which are provided correspondingly to the discharge electrodes in the ventilation passage. The discharge electrodes are formed from a plurality of needle-like electrodes and provided in parallel while keeping a predetermined interval in a width direction of the ventilation passage in such a manner that the ground electrodes are correspondent to electrode tips of the plurality of needle-like electrodes in an orthogonal direction. A partition plate 20 is provided mutually between the plurality of needle-like electrodes in such a manner that changes in field strengths are prevented from exerting influences upon each other. Thus, the generation amount of minus ions for each discharge electrode is increased.SELECTED DRAWING: Figure 6【課題】複数本の放電電極を使用し、その本数に応じた有効なマイナスイオンの発生量が得られるようにする。【解決手段】送風通路５を有する装置本体と、該装置本体の上記送風通路に設けられた針状の放電電極１４と、上記装置本体の上記送風通路に空気を流す送風手段と、上記放電電極に放電用の高電圧を印加する高電圧発生手段と、上記送風通路の放電電極に対応して設けられたアース電極１５とからなるマイナスイオン発生装置において、上記放電電極を複数本の針状電極により構成し、上記送風通路の幅方向に所定の間隔を保って並設するとともに、上記アース電極がそれら複数本の針状電極の電極部先端に対して直交方向に対応するようにし、かつ上記複数本の針状電極相互の間には仕切板２０を設けて相互の電場強度の変化が影響し合わないようにして、個々の放電電極のマイナスイオン発生量を増大させた。【選択図】図６
