Sorin Marcel Socaciu (born 23 April 1972 in Mociu) is a former Romanian rugby union player.

During his career, Socaciu played for Rovigo Delta in Italy, Tarbes, Périgueux and Belvès, all in France.

He was a member of his national side for the 5th and 6th Rugby World Cups in 1999 and 2003.

At the 2003 World Cup he played three matches against Ireland, Wallabies and Namibia.

This biographical article relating to Romanian rugby union is a stub.