Vacuum cleaner

The utility model provides a vacuum cleaner, and more specifically, the vacuum cleaner includes: a cleaner body; moving wheels which are provided on both side surfaces of the cleaner body, rotate in order to travel the cleaner, and support the cleaner body so that the cleaner body can rotate forward and backward; a wheel motor assembly which is connected to the moving wheels and rotates the movingwheels for the travel of the vacuum cleaner; a main motor that is provided inside the cleaner main body, is positioned more rearward than the vertical extension line of the center of rotation of themoving wheel, and is driven to suck in dust; the battery is arranged in the dust collector body, is located at the position behind the vertical extension line of the rotating center of the moving wheel and is used for providing power for the main motor and the wheel motor assembly; by means of the arrangement of the main motor and the battery, the gravity center of the dust collector body is located behind the vertical ext