The Nabataeans were a group of nomads, living in The Arabian desert, who banded together and held central of a rather vast area for over 400 years. At this peak, the Nabataeans stretched from modern-day Madain Saleh to Damascus and from Western Iraq into Peninsula of Sinai according to some historians. No one is really sure how large their Empire really was. That is how illusive and mysterious while their caravans traveled widely. It's hard to be certain of the borders of their kingdom or the extent of their travel.      Wadi Mukattab in south of Sinai is also known as the Valley of the Inscriptions, in this valley there are a lot of Nabataean Inscriptions, In this paper the Nabataeans in Wadi Mukattab, will be studied – through their Inscriptions – in detail, and we will also illustrate the Arabian Egyptian relations during the Roman period.