The origins of the club are dating back to 1951, when Stane Urek suggested a formation of a basketball club in Poljane (KK Poljane), at one of Ljubljana's high schools. The club got its official permission to play on 13 April in the same year. After just two days, they organised their first tournament, at which they invited teams Rudar (Trbovlje) and Krka (Novo Mesto); both playing in first national league.
The team was also named KK Krim, KK Slavija, KK Odred, and finally KD Slovan – the name they have had until today. After having played for more than 20 years on the basketball court in High school Poljane, they moved to sports centre Slovan in Kodeljevo, where they have been playing ever since.