 In 2004, he was signed by Ligue 1 side Rennes and went on to appear in 42 league matches for the French club.In 2007, he returned to Brazil signing with Santos FC and quickly established himself with the club helping them to the 2007 Campeonato Paulista title.In August 2008, Adaílton renewed his contract with Santos FC, until December 2009 and signed in February 2010 for FC Sion.