An object of the present invention is to provide an air purification device and an air purification method with further improved purification efficiency. An air purification device according to a first embodiment includes a flow path for flowing air, a plasma generating unit for generating plasma in a predetermined portion of the flow path, and a plasma generation unit for generating plasma in a predetermined portion of the flow path. The photocatalyst filter 7 includes a photocatalyst filter 7 arranged downstream and a light source 9 for irradiating the photocatalyst filter 7 with light. The plasma generation unit 5 generates atmospheric pressure plasma. According to this air purification device 1, purification efficiency can be increased. [Selection diagram] FIG.【課題】浄化効率を更に高めた空気浄化装置、及び空気浄化方法を提供することを目的とする。【解決手段】第１実施形態の空気浄化装置１は、空気を流通させる流路３と、流路３の所定部位にプラズマを発生させるプラズマ発生ユニット５と、流路３の前記所定部位よりも下流側に配された光触媒フィルタ７と、光触媒フィルタ７に光を照射する光源９と、を備える。プラズマ発生ユニット５は、大気圧プラズマを発生させる。この空気浄化装置１によれば、浄化効率を高めることができる。【選択図】図２
