The air cleaner has an upper surface 21, a side surface 22, and a lower surface 23. An air inlet 24 is provided at the center of the upper surface 21. The provided housing 20, the self-propelled device 30, the motor 40 having the output shaft 41 disposed in the housing 20, and the fan 50 disposed in the housing 20 and rotated by the rotation of the output shaft 41 of the motor 40. The first filter member 60 disposed in the housing 20 and rotated by the rotation of the output shaft 41 of the motor 40 and disposed on the side surface of the housing with respect to the fan 50, and disposed in the housing 20. The second filter member 70 is provided which is rotated by the rotation of the output shaft 41 of the motor 40 and is disposed on the side surface of the housing with respect to the first filter member 60.空気清浄機は、上面２１、側面２２及び下面２３を有し、上面２１の中央部に吸気口２４が設けられ、側面２２、又は、上面２１の外縁部及び側面２２に排気口２６，２７が設けられた筐体２０、自走装置３０、筐体２０内に配置され、出力軸４１を有するモータ４０、筐体２０内に配置され、モータ４０の出力軸４１の回転によって回転させられるファン５０、筐体２０内に配置され、モータ４０の出力軸４１の回転によって回転させられ、ファン５０よりも筐体側面側に配設された第１フィルター部材６０、及び、筐体２０内に配置され、モータ４０の出力軸４１の回転によって回転させられ、第１フィルター部材６０よりも筐体側面側に配設された第２フィルター部材７０を備えている。
