An air cleaner, comprising: an air cleaning module including a first fan housing having a housing space portion in which a first fan is accommodated; an air flow controller that is provided at an upper side of the air cleaning module and adjusts a discharge direction of the air flow generated in the air cleaning module and, the air flow controller being configured to be movable and including a second fan housing in which a second fan is accommodated, a discharge portion through which air passing through the second fan is discharged, and a discharge grill disposed at an upper side of the second fan housing and configured to form the discharge portion, wherein the air flow controller is movable between a laid-out state and an inclined erected state; the air cleaner being characterized by further comprising a display device provided at an upper portion of the air flow controller and having a display screen to form at least a portion of the upper surface of the air cleaner, wherein the display device is movable together with the air flow controller and displays operation information of the air cleaner: the discharge grill comprises a depression portion which has a shape depressed at a center portion of the discharge grill and supports the display device, the display device comprises: a display PCB that is provided in the depression portion and on which an illumination source (651,655) is provided; and a reflector that is coupled to an upper side of the display PCB; the illumination source comprises: a first illumination source that displays the operation information of the air cleaner; and a second illumination source that displays a rim of the display screen; and the display PCB includes a board main body, and the board main body includes a main body front surface portion on which the first illumination source is provided and a main body rear surface portion on which the second illumination source is provided. an air cleaning module including a first fan housing having a housing space portion in which a first fan is accommodated; an air flow controller that is provided at an upper side of the air cleaning module and adjusts a discharge direction of the air flow generated in the air cleaning module and, the air flow controller being configured to be movable and including a second fan housing in which a second fan is accommodated, a discharge portion through which air passing through the second fan is discharged, and a discharge grill disposed at an upper side of the second fan housing and configured to form the discharge portion, wherein the air flow controller is movable between a laid-out state and an inclined erected state; the air cleaner being characterized by further comprising a display device provided at an upper portion of the air flow controller and having a display screen to form at least a portion of the upper surface of the air cleaner, wherein the display device is movable together with the air flow controller and displays operation information of the air cleaner: the discharge grill comprises a depression portion which has a shape depressed at a center portion of the discharge grill and supports the display device, the display device comprises: a display PCB that is provided in the depression portion and on which an illumination source (651,655) is provided; and a reflector that is coupled to an upper side of the display PCB; the illumination source comprises: a first illumination source that displays the operation information of the air cleaner; and a second illumination source that displays a rim of the display screen; and the display PCB includes a board main body, and the board main body includes a main body front surface portion on which the first illumination source is provided and a main body rear surface portion on which the second illumination source is provided. the discharge grill comprises a depression portion which has a shape depressed at a center portion of the discharge grill and supports the display device, the display device comprises: a display PCB that is provided in the depression portion and on which an illumination source (651,655) is provided; and a reflector that is coupled to an upper side of the display PCB; a display PCB that is provided in the depression portion and on which an illumination source (651,655) is provided; and a reflector that is coupled to an upper side of the display PCB; the illumination source comprises: a first illumination source that displays the operation information of the air cleaner; and a second illumination source that displays a rim of the display screen; and a first illumination source that displays the operation information of the air cleaner; and a second illumination source that displays a rim of the display screen; and the display PCB includes a board main body, and the board main body includes a main body front surface portion on which the first illumination source is provided and a main body rear surface portion on which the second illumination source is provided.