This is a Latest technology for the removal of kidney stone (size 8mm to 15mm). When lithotripsy is fails to give result in kidney stone RIRS (Retrograde Intra Renal surgery) is the best method to treat kidney Stone. This technology is invented in 2005. In this technology very thin flexible ureteroscope is passed from urethra through bladder and ureter into the kidney. Tip is deflected upto 270 degree so all the calyces of the kidney are visualized. Stone is located inside the calyx and with help of the holmium laser fibre stone is disintegrated into dust. Finally with IITV confirmation is done for total clearance of stone. D. J. stent is put to enhance the stone clearance.