The research generally aims to shed light on the productive and economic efficiency within the sheep fattening sector in North Sinai Governorate Egypt, the results showed that the optimal weight for production was about 60.4, 45, 40 kg per head within the three categories, the first category is less than 5 head, the second is 5-10 heads, The third is more than 10 heads, respectively, the bulk of the profits amounted to about 76.6, 66.5, 59.1 kg per heads within the three holding categories in the same order, which indicates that there is a missing income per head that amounted to about L.E. 247.2, 173.3, 153.2 per head within the three holding categories in a sample The study was conducted in North Sinai Governorate during the 2021 fattening season. It was also found that the economic efficiency of sheep fattening farms reached its lowest value of about L.E. 0.84 within the farms of the first possession category, while its maximum value reached about L.E. 1.12 for the farms of the third possession category, Referring to the present net value of the head, the lowest value of sheep reached about L.E. 1.22 for the farms of the first possession category, while the maximum value was about L.E. 1.47 per head within the farms of the third possession category. The research recommends expanding the size of the animal possession via the number of sheep heads, increasing the used quantities of the production elements combined and using them optimally.