Nicolae Constantin (born 9 December 1973 in Bucureşti) is a retired Romanian footballer. He spent most of his playing career with his heart club, Petrolul Ploiesti, and FC Rapid Bucuresti. He played mainly as a central defender, but could also go as a center forward. Although uncapped by Romania, he has been regarded as one of the best central defenders in his country, since he was a very determined and hard-working man.