Among various cartilage regeneration treatments, methods using mesenchymal stem cells, whose safety and effectiveness have been verified, are emerging. Mesenchymal stem cell can be implanted through open arthrotomy or arthroscopy. Although arthroscopic surgery has the advantage of earlier recovery and less scar formation compared to open arthrotomy, dry arthroscopy is not technically easy, which is necessary for successful implantation and prevention of washout. This Technical Note will introduce an easier and more effective method of dry arthroscopic mesenchymal stem cell implantation.