To provide an air cleaner capable of securely and efficiently purifying air by collecting dust and odorous substance floating in air.

The air cleaner 1 can securely and efficiently purify air G since the floating substance A such as dust, which becomes a charged body C charged by a liquid sprayer 12 and an air ion releasing device 10, is collected by a collecting means 11. The air cleaner 1 can also collect allergens such as pollens, tick shells and tick feces, and chemical substances to cause the sick house syndrome, so that the interior air environment can be further improved.