Wheat is considered one of the most important cereal crops In Egypt. After adoption of economic reform policy. farmers became responsive to many variables in making their farm decision especially in long run. The research problem and the objective of the study handles the estimation for supply response functions for wheat. during the Egyptian economic reform policy. to determine the most variables affecting the acreage response. annual and full time period response for wheat farmers. To achieve the main objective. distributed lag models have been applied. i.e.. Marc Nerlove model for wheat acreage supply response in Egypt. through period (1990-2004). The results indicate that according to Marc Nerlove of partial adjustment model for wheat supply response functions. there is a positive response to the yield. farm prices. costs of production. and net return to the economic variables in absolute and relative forms. The best model according to the full time period to fulfillment the response, indicate that the yield productivity of wheat was the best variable the affect on the acreage supply response of wheat. It can be said that. the farmer's response to the productivity of wheat. in fact reflects the response to technology. and the farmer's response to the relative prices reflects the effectiveness of structural adjustment in the agricultural sector. Recommendation of the study is based on the emphasis of effectiveness of the agricultural extension for increasing the wheat productivity and increasing the farm gate price of wheat as an incentive to expand wheat cultivated area.