To provide an air cleaner capable of easily and quickly removing a dust deposited on a surface of a dust-collection filter without separating the dust-collection filter.

The air cleaner is provided with a vibration member arranged adjacently to the dust-collection filter; and an oscillation motor assembly arranged on the vibration member. The dust-collection filter is inclinedly arranged such that an upper end is deviated to a front surface of a housing as compared with a lower end. A tray for receiving the dust dropping off from the dust-collection filter when the dust-collection filter is vibrated by vibration of the vibration member is arranged on the lower part of the dust-collection filter. A rear surface plate of the tray is extended toward the lower end of the dust-collection filter and prevents the dust collected on the tray from being scattered and deposited on the dust-collection filter again. At least one surface of the dust-collection filter is coating-treated such that electro-static force is not generated and facilitates removal of the dust.