The present invention discloses a vacuum cleaner which can remove substances from the bottom by a rotary force of a brush and a vacuum pressure operated on a suction head by rotatably installing the brush on the suction head. The vacuum cleaner consults a user's convenience by preferentially sucking thin and long substances such as hairs or furs of a pet dog not to be wound around the brush. The vacuum cleaner includes a suction head being installed at a front end of a suction path for sucking substances by a vacuum pressure generated by a suction motor, and having a suction hole for sucking the substances on its bottom, a brush installed on the suction hole of the suction head, and rotated to contact the bottom, and a hair tunnel formed on the suction head not to interfere with the brush, for preferentially sucking thin and long substances from the bottom.