Investments of the key tools for economic and social development is through increased production, and increase the capacity of the national economy to face global challenges as well as creating new job opportunities contribute to raising the standard of living, which turned out to be the economic sector's ability alone without the agriculture sector on advancing economic development matter which requires attention to the agricultural sector and increase the size of investments against him. The.refore,.the study.concluded.the.following: Low investments directed to the agriculture sector size as it's not proven significant statistical model of the value of total agricultural investment at current prices during the study period, and agricultural investment for the public sector at current prices the value of an annual fall drop significant statistically, while the moral model did not prove the statistical value of agricultural investment to the private sector prices ongoing during the study period, the national-level investment sectors of industry, petroleum, electricity and.construction.value. increases.annually.confirmed statisticall.ysignificant.increase. Increase the relative importance of the contribution of private agricultural investment to total investment directed to the agriculture sector size, it could be limited to the most important factors affecting the agricultural investment in several factors, the most important agricultural income value, the value of agricultural exports, the value of agricultural imports, national exports, the value of national imports, the value of loans agricultural, the value of agricultural savings, interest rates, crop area, planting area, the area under cultivation, as sure a statistically significant sample paced factors affecting agricultural investment, and about 95.1% of the changes in agricultural investment total, but due to the national income, and that the change in national income. 10% leads to a total change.of.agricultural.investment.by.41.7%. The growth rate of the agricultural sector arising from the General Agricultural investment and private agricultural investment in Egypt totaled 0.02, which means that to increase the growth rate in the agriculture sector by 1% it has to be to increase domestic investment to the agriculture sector rate of 0.02%.