PROBLEM TO BE SOLVED: To provide an air cleaner that improves insect-trapping function.SOLUTION: An air cleaner 1 is formed with an undersurface suction port 14 at the undersurface thereof, has a blower 23 generating an air flow toward an air blow-out port 15 through a filter unit 22 from the undersurface suction port 14 and is attached to an attachment object so that a rear face of a housing 21 abuts on the attachment object. A pressure sensitive adhesive sheet having an adhesive face at the surface thereof is provided in an air-flow passage from the undersurface suction port 14 to the filter unit 22.SELECTED DRAWING: Figure 3【課題】捕虫機能を高める空気清浄機を提供する。【解決手段】空気清浄機1は、下面に下面吸込口14が形成され、送風機23が下面吸込口14からフィルタユニット22を経て吹出口15へ向かう空気の流れを生じさせ、筐体21の後面を取付対象物に当接させて取り付けられる。下面吸込口14からフィルタユニット22に至る空気の流れの経路に、表面に粘着面を有する粘着シートが設けられている。【選択図】図3