The alleged incident happened in Sherrington Road Park at about 22:00 BST on Wednesday, 17 June.
Dara Abdullah, 39, of Surrey Road, Ipswich, denied one charge of rape and two other sex assaults when he appeared at Ipswich Crown Court.
He has been released on bail and is due to face trial in January.
A man has appeared in court on sex assault charges after a 17-year-old girl was allegedly attacked in a park in Ipswich.