After the relegation, Tarnovia played in the Second Division. In 1949, it finished in the second position, behind Rymer Radlin. In 1955, Tarnovia was relegated to the third level, and in 1956, to regional league, or A-Class. In the 1960s and 70s, Tarnovia played either in the third or fourth level of Polish football system. In July 1979, three sports clubs from Tarnów (Tarnovia, Metal and Tamel) merged as MZKS Tarnovia. The new team finished second in the regional league, behind Igloopol Dębica.
