Extracorporeal shockwave lithotripsy (ESWL) is the most common method of ureteral stone management. Since 2008, RSCM has ben using ESWL piezolith 3000 richard wolf and efficacy quotient (EQ) value have not yet studied. The study aims was to determine the efficacy quotient (EQ) of ESWL using piezolith richard wolf 3000 machine for ureteral stone by analyzing free-stone rate with location of stones, number of stones, stone burden, stone opacity, obstruction and kidney function. This cross sectional study was carried out in January 2008-December 2011, with multivariate analytical study. Ninety five percent (n=113) of 119 patients were declared stone free after the first ESWL. EQ value was 0.89. Stone size was the correlated with stone free rate (p<0.05). It is concluded that ESWL procedure using richard wolf piezolith 3000 machine patients had better EQ and better stone-free rate than previous reports using similar machines.