A vacuum cleaner comprising: a first cleaner module arranged to clean a floor in an upright mode; and a second cleaner module that is removably coupled to the first cleaner module, wherein the second cleaner module is arranged to be separated from the first cleaner module so as to enable cleaning in a handheld mode, wherein the first cleaner module includes a first fan motor arranged to generate a suction force, and a first dust collection unit arranged to filter foreign materials from air suctioned by the first fan motor, and the second cleaner module includes a second fan motor arranged to generate a suction force when used in the handheld mode, a second body, an extension pipe installed on the second body, and a second dust collection unit arranged to filter foreign materials from air suctioned by the second fan motor through the extension pipe; wherein the first cleaner module includes a first body arranged to house the first fan motor, a head unit that is disposed at a front side of the first body and that is arranged to suction the air from the floor, an extension frame connected to the first body, wherein a rear face of the extension frame is provided with a seating recess in which the extension pipe is arranged to be seated, and a lower portion of the extension frame is provided with a catching recess in which a leading end of the extension pipe is arranged to be caught and supported; and the second cleaner module is removably coupled to the extension frame, wherein in a state in which the second cleaner module is coupled to the extension frame, the extension pipe is inserted into and supported in the seating recess and the catching recess. a first cleaner module arranged to clean a floor in an upright mode; and a second cleaner module that is removably coupled to the first cleaner module, wherein the second cleaner module is arranged to be separated from the first cleaner module so as to enable cleaning in a handheld mode, wherein the first cleaner module includes a first fan motor arranged to generate a suction force, and a first dust collection unit arranged to filter foreign materials from air suctioned by the first fan motor, and the second cleaner module includes a second fan motor arranged to generate a suction force when used in the handheld mode, a second body, an extension pipe installed on the second body, and a second dust collection unit arranged to filter foreign materials from air suctioned by the second fan motor through the extension pipe; wherein the first cleaner module includes a first body arranged to house the first fan motor, a head unit that is disposed at a front side of the first body and that is arranged to suction the air from the floor, an extension frame connected to the first body, wherein a rear face of the extension frame is provided with a seating recess in which the extension pipe is arranged to be seated, and a lower portion of the extension frame is provided with a catching recess in which a leading end of the extension pipe is arranged to be caught and supported; and the second cleaner module is removably coupled to the extension frame, wherein in a state in which the second cleaner module is coupled to the extension frame, the extension pipe is inserted into and supported in the seating recess and the catching recess.