Košarkaški klub Ergonom (Serbian Cyrillic: Кошаркашки клуб Ергоном, transl. Ergonom Basketball Club), commonly referred to as KK Ergonom, was a men's professional basketball club based in Niš, Serbia. The club used to compete in the top-tiers YUBA League and Basketball League of Serbia. Their home arena was the Čair Sports Center.