Benjamin Kayser (born 26 July 1984 in Paris, France) is a French Rugby union player who plays as hooker for Clermont Auvergne in the French Top 14.He rejoined Stade Français at the end of the 2008/2009 season from Leicester Tigers in the Guinness Premiership, who he joined during the 2007–08 season. Kayser signed for Castres Olympique for the 2010–11 Top 14 season.