A vacuum cleaner comprising: a body including a space configured to allow air to flow therethrough; a suction inlet configured to introduce the air into the body; a first cyclone provided in the body and configured to separate foreign substances from the air introduced through the suction inlet; a dust separation module, comprising a filter unit configured to separate foreign substances from the air received from the first cyclone; and a second cyclone arranged within and separated from the filter unit, the second cyclone comprising: a cyclone base; a storage unit arranged adjacent to a lower portion of the second cyclone; and a cyclone array coupled to the cyclone base and configured to allow the air to pass through an upper portion of the second cyclone and discharge the foreign substances collected by the second cyclone to the storage unit and characterized in that the cyclone base and the storage unit are rotatably coupled to each other via a hinge coupling portion; and a rotation restraining protrusion is formed in the filter unit and is configured to be accommodated in a rotation restraining groove formed in the storage unit to couple the cyclone base and the storage unit. a body including a space configured to allow air to flow therethrough; a suction inlet configured to introduce the air into the body; a first cyclone provided in the body and configured to separate foreign substances from the air introduced through the suction inlet; a dust separation module, comprising a filter unit configured to separate foreign substances from the air received from the first cyclone; and a second cyclone arranged within and separated from the filter unit, the second cyclone comprising: a cyclone base; a storage unit arranged adjacent to a lower portion of the second cyclone; and a cyclone array coupled to the cyclone base and configured to allow the air to pass through an upper portion of the second cyclone and discharge the foreign substances collected by the second cyclone to the storage unit and characterized in that the cyclone base and the storage unit are rotatably coupled to each other via a hinge coupling portion; and a filter unit configured to separate foreign substances from the air received from the first cyclone; and a second cyclone arranged within and separated from the filter unit, the second cyclone comprising: a cyclone base; a storage unit arranged adjacent to a lower portion of the second cyclone; and a cyclone array coupled to the cyclone base and configured to allow the air to pass through an upper portion of the second cyclone and discharge the foreign substances collected by the second cyclone to the storage unit and characterized in that the cyclone base and the storage unit are rotatably coupled to each other via a hinge coupling portion; and a cyclone base; a storage unit arranged adjacent to a lower portion of the second cyclone; and a cyclone array coupled to the cyclone base and configured to allow the air to pass through an upper portion of the second cyclone and discharge the foreign substances collected by the second cyclone to the storage unit and characterized in that the cyclone base and the storage unit are rotatably coupled to each other via a hinge coupling portion; and a rotation restraining protrusion is formed in the filter unit and is configured to be accommodated in a rotation restraining groove formed in the storage unit to couple the cyclone base and the storage unit.