The army destroyed 27 vehicles, including 21 motorcycles, that were used by militants in terrorist attacks, said Mohamed Samir, the spokesperson of the Armed Forces.
Apart from the 14 militants arrested, 93 illegal immigrants were also detained by the border guard forces, according to the spokesperson.
North Sinai has been the scene of many violent attacks by Islamists since the January 2011 revolution that toppled Egyptian strongman Hosni Mubarak.
Islamist militant attacks targeting police and military increased after the ouster of president Mohammed Morsi last year.
The military has launched security campaigns in the area, arrested suspects and demolished houses that belong to terrorists, including those facilitating tunnels leading to the Gaza Strip.