Gianluca Susta (born 10 April 1956, Biella) is an Italian politician. He is a member of the Italian Senate, elected in February 2013. Previously he served as Mayor of Biella from 1992 to 2004, he was a member of the European Parliament between 8 May 2006, when he took up a seat vacated after the 2006 Italian general election and his election to the Italian Senate. He represents the Margherita within the ALDE parliamentary group. He took a pro-European stance by signing the Spinelli Group Manifesto.