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 . <EOS>