In this article, the author deals with the foundation, development, results and reasons of disappearance of the most successful sports club in the interwar era; the Jewish swimming and sports club Bar Kochba Bratislava. After the birth of Czechoslovakia, sports in Slovakia could develop on a national basis. Large national minorities had the same possibilities. To eliminate the risk of misusing sports for political purposes, sport representatives decided to organise it on the ethnic principle instead of the regional one. Thanks to this a wide variety of national sports organisations were established, including some Jewish ones. Even though Jews constituted only 2.01% of the population in the interwar period in today’s territory of Slovakia (Bergerová, 1992: 108), they succeeded not only in sports but in other areas of social life as well.