An air cleaner, comprising: at least one air cleaning module (100, 200) including a fan (160, 260), a filter (120, 220), and an inlet (102, 202) through which air is suctioned into the filter; an air flow controller configured to be movably disposed on the at least one air cleaning module (100, 200) and including an air flow control fan to control a flow of the air discharged from the at least one air cleaning module, wherein the air flow controller is movable from a first position in which where the air is discharged in an upward direction to a second position in which the air is discharged in a diagonally upward direction, characterized in that the at least one air cleaning module (100, 200) includes first and second air cleaning modules (100, 200), each of the first and second air cleaning modules being configured to generate an independent air flow and being stacked in a vertical direction, wherein the first air cleaning module includes a first outlet formed at an upper portion thereof, wherein air discharged through the first outlet flows to the upper side in the axial direction, wherein the air flow controller is disposed on the second air cleaning module, and an air flow generated in the second air cleaning module is introduced into the air flow controller, an air flow path of the air flow controller communicating with an air flow path of the second cleaning module, and wherein a second outlet is provided at an upper end of the air flow controller, and the air passing through the second air cleaning module is discharged through the second outlet to the outside via the air flow path of the air flow controller. at least one air cleaning module (100, 200) including a fan (160, 260), a filter (120, 220), and an inlet (102, 202) through which air is suctioned into the filter; an air flow controller configured to be movably disposed on the at least one air cleaning module (100, 200) and including an air flow control fan to control a flow of the air discharged from the at least one air cleaning module, wherein the air flow controller is movable from a first position in which where the air is discharged in an upward direction to a second position in which the air is discharged in a diagonally upward direction, characterized in that the at least one air cleaning module (100, 200) includes first and second air cleaning modules (100, 200), each of the first and second air cleaning modules being configured to generate an independent air flow and being stacked in a vertical direction, wherein the first air cleaning module includes a first outlet formed at an upper portion thereof, wherein air discharged through the first outlet flows to the upper side in the axial direction, wherein the air flow controller is disposed on the second air cleaning module, and an air flow generated in the second air cleaning module is introduced into the air flow controller, an air flow path of the air flow controller communicating with an air flow path of the second cleaning module, and wherein a second outlet is provided at an upper end of the air flow controller, and the air passing through the second air cleaning module is discharged through the second outlet to the outside via the air flow path of the air flow controller.