The takfiri terrorists included one of the leaders of the Sinai-based terrorist group Ansar Biet el-Maqdes, Egypt's military spokesperson Colonel Tamer el-Refa'e said in a statement.
Sixteen suspected terrorists were also arrested during the raids, he said.
Egypt's North Sinai has witnessed many terror attacks since the January 2011 revolution that toppled the former Egyptian President Hosni Mubarak.
The attacks, mainly targeting police and military, increased after the ouster of Islamist ex-president Mohamed Morsi in 2013 by military following massive protests against his rule.
The security forces have arrested suspects and demolished houses that belonged to terrorists, including those facilitating tunnels leading to the Gaza Strip.