A vacuum cleaner is provided. The vacuum cleaner includes a cleaner body generating a suction force, and a suction unit comprising a suction chamber opened to suck foreign materials by the suction force. The suction unit includes a brush drum partially protruding toward an outside of the suction chamber within the suction chamber and provided rotatably, and a blade provided to collect foreign materials as extended along an extending direction of the brush drum while being spaced apart leaving a gap from the brush drum inside the suction chamber, and including a transformable portion to be transformed to widen the gap.