In July 2005 Ventola signed a two-year contract with Atalanta. In his first season back at the club, he helped his team to win the 2005–06 Serie B title with his decisive goalscoring performances, scoring 15 goals in 35 appearances. He scored six goals in 29 games during the 2006–07 Serie A season, but he later became excluded from the club and his contract was not renewed. In total he scored 35 goals for the club in 101 appearances between league and Coppa Italia matches over three seasons (two in Serie A and one in Serie B).