PROBLEM TO BE SOLVED: To reduce the size of an electric discharge unit.SOLUTION: An air cleaner includes: an electric discharge unit (23) that includes an electric discharge device (32) that cause streamer discharge between a discharge electrode (33) and an opposite electrode (34) opposite to the discharge electrode (33), and a power supply device (41) boosting a voltage supplied from outside and applying the voltage across electrodes (33, 34) and a case member (30) that accommodates the electric discharge device (32) and the power supply device (41) integrally.COPYRIGHT: (C)2014,JPO&INPIT【課題】放電ユニットを小型化すること。【解決手段】空気清浄機は、放電電極(33)と放電電極(33)に対向する対向電極(34)との間でストリーマ放電を行う放電装置(32)と、外部から供給された電圧を昇圧して両電極(33,34)へ印加する電源装置(41)とを備えた放電ユニット(23)を備え、放電装置(32)と電源装置(41)とを一体として収容するケース部材(30)を備えている。【選択図】図2