"The armed forces have staged several raids… during which 17 terrorists were killed in exchanges of fire with army and civil forces," Egyptian military spokesman Mohamed Samir said on Facebook.
The army, he added, had also destroyed 64 militant sites in North Sinai.
Last week, the Egyptian army said it had killed 12 militants and arrested 70 others in Sinai between December 3 and December 10.
For more than a year, Egypt has cracked down on militant groups in Sinai – which borders both Israel and the blockaded Gaza Strip – amid a spate of militant attacks that have targeted army and police personnel.
In a particularly deadly attack on October 24, unidentified militants killed 31 Egyptian troops and injured an equal number.
In the immediate wake of that attack, the Egyptian government established a kilometer-wide "buffer zone" between the restive peninsula and the GazaStrip.
The move was taken with the stated aim of "protecting Egypt's national security" after the army said it had discovered a number of cross-border tunnels in the area.