A total of 167 patients underwent mascroscopic vasovasostomy by a modified double layer reanastomosis to correct postvasectomy sterility during a 5-year period between 1986 and 1991. We obtained the anatomical patency and pregnancy rates from 61 patients whose follow-ups were completed. There by, we report the following results. 1. Of the 167 patients, the mean age and the average duration of vasobstruction were 34.0 and 4. 4 years respectively. The reasons for ecanalization were desire for more baby in 71.9%. death of children, 24.5% and remarriage in 3.6%. 2. Of the 61 patients with complete follow-up. the anatomical patency and pregnancy rates were 83.6%(51 patients) and 50.8%(31 patients) respectively. 3. For the 36 out of 61 patients whose duration of vasobstruction was less than 5 years, the anatomical patency and pregnancy rates were 88.9%(32 patients) and 58.3%(21 patients) respectively. The rates for the remaining 25 patients whose duration was greater than 5 years were 80.0%(20 patients) and 40.0%(10 patients). 4. Of the 61 patients, 51 exhibited sperms from the proximal vas on microscope during the operation. Their anatomical patency and pregnancy rates were 88.2%(45) and 54.9%(28) respectively. The rates for the remaining 10 patients without any sperms were 60.0%(6) and 30.0%(3). From the above results, we can conclude that macroscopic reanastomoses by modified double layer technique has appreciable success rates that could possibly be compared to the microscopic results.