This study was investigated the levels of some reproductive characters of Brown Swiss cattle which are at Konya Animal Research institute. Data of 230 cows within the period from 1990 to 1999 were analyzed The average of age at first insemination was 20.8 month, age at first calving was 32.7 month, conception rate was 80.04 %, birth rate was 93.31 %, anoestrus rate was 4.46 %, percentage of abortions was 2,23 %, premature btrth and slill birth were 1.67 and 1 81 %, twinning rate was 0.97 the number of insemination per conception was 1.76. calving interval was 382.5 day, gestation length was 286.5 day. service period was 124.0 day. the interval from parturition to first insemination was 72,5 day, the interval from first insemination to conception was 47.7 day. As a results, these fertility trails in Brown Swiss herd at Konya Animal Research Institute indicated a good reproductive performance.