Focusing integrated lens device

The utility model relates to an integral lens device capable of focusing, which comprises a lens chamber, a lens group disposed in the lens chamber and an aperture, wherein a photosensitive element is arranged at the rear portion of the lens chamber. The lens device further comprises a focusing ring and a buffer element, wherein the focusing ring is arranged at the front portion of the lens chamber and pushes against one side of the lens group, the periphery of the focusing ring is provided with outer threads, the inside of the lens chamber is provided with inner threads engaged with the outer threads, and the buffer element is arranged between the other side of the lens group and the lens chamber. The lens device can reduce tolerance and prevent dust influencing images.