PROBLEM TO BE SOLVED: To provide an ion generator capable of suppressing charges accumulated in an electrode for ion generation and maintaining high ion generation efficiency during the entire operation period. An ion generating device (101) uses an anion generating electrode (12) for generating anions from the tip and a battery (1) as a power source and one electrode of the battery (1) as a reference potential. With respect to the anion generator 11 for applying a voltage for generating anions, a cation generating electrode 22 for generating cations from the tip, the battery 1 as a power source, and one pole of the battery 1 is a reference potential. And a cation generator 21 for applying a cation generation voltage to the cation generation electrode 22. The directions of the tips of the anion generation electrode 12 and the cation generation electrode 22 are different from each other, and the extension line of the anion generation electrode 12 toward the tip direction and the extension direction of the cation generation electrode 22 toward the tip direction. It does not intersect the extension line. [Selection diagram] Figure 2【課題】イオン発生用電極に蓄積される電荷を抑制し、かつ運用期間全体で高いイオン発生効率を維持できるイオン発生装置を提供する。【解決手段】イオン発生装置１０１は、先端から陰イオンを発生させる陰イオン発生用電極１２と、電池１を電源にし、かつ当該電池１の一方の極を基準電位にして陰イオン発生用電極１２に対して陰イオン発生用電圧を印加する陰イオン発生器１１と、先端から、陽イオンを発生させる陽イオン発生用電極２２と、電池１を電源にし、かつ電池１の一方の極を基準電位にして陽イオン発生用電極２２に対して陽イオン発生用電圧を印加する陽イオン発生器２１と、を備える。そして、陰イオン発生用電極１２と陽イオン発生用電極２２の先端の向きは互いに異なり、かつ、陰イオン発生用電極１２の先端方向への延長線と陽イオン発生用電極２２の先端方向への延長線とは交わらない。【選択図】図２
