The objective of this study is to explain the mega structural elements and to determine the tectonic framework of Sinai Peninsula, Egypt. This study has been implemented by the magnetic method. Magnetic data will be analyzed to determine the depth to the basement surface by using Euler deconvolution method and power spectrum. The depths obtained from magnetic data will be used as a control point in the 2.5D magnetic modelling in order to minimize the error and facilitate the iteration of the suggested models. These different models indicate that the depth to basement surface increases from South to Northern Sinai. This depth to basement surface ranges from basement outcrop in southern Sinai to more than 4km in northern Sinai.