The device according to the invention for cleaning the inside of the barrel of a firearm consists of a pulling element (A) and a cleaning element (B) connected thereto. In this case, the cleaning element (B) has a first wetting and cleaning unit (BI), particularly for precleaning the barrel, a wiping unit (B2) and a second wetting and cleaning unit (B3), particularly for preserving the barrel. The device according to the invention has many advantages. The advantageous construction of the device means that only little expenditure of force is required during use, and so it can be pulled through the barrel of a firearm quickly in one go without stopping to put it down. The arrangement according to the invention, comprising a first wetting and cleaning unit, particularly for precleaning purposes, and a second wetting and cleaning unit, particularly for preserving purposes, with a wiping unit arranged in between, allows effective, and especially benign, cleaning of a barrel to be achieved even without the use of brushes.