On March 7, 2004, Robbins signed with the New York Giants for six years and $20 million, including a $4 million bonus. In his first season with the Giants in 2004, he started all 15 games and recorded 40 tackles (31 solo), 5 sacks, 1 interception, 2 passes defensed and 2 forced fumble. In 2005, played in all 16 regular season games with 6 starts at defensive tackle and finished the season with 23 tackles (14 solo), 1.5 sacks, 1 pass defensed and 1 fumble recovery. In 2006, Robbins started all 16 regular season games and the NFC Wild Card Game and finished with career-high totals of 62 tackles (39 solo), 5.5 sacks, 2 interceptions and 34 quarterback hurries. In 2007, he played in 16 regular season with 15 starts and started all 4 postseason games and finished with 42 tackles (21 solo), 5.5 sacks, 26 QB hurries, 10 QB hits and 1 pass defensed.