ساسي, فطيمةسعودي, عبد الصمد2018-10-102018-10-102017-082543-3709http://dspace.univ-msila.dz:8080//xmlui/handle/123456789/5821The private sector occupies a pivotal role in economic and social development, due to its capabilities and characteristics which qualify it to influence various economic and social fields and this what affects the economic activity in a way that pushes the economic policy makers to the need to focus on the mechanisms of the development and the provision of an appropriate climate to its activity where the private sector grows through the private investment. When we will look at our work to analyze the contribution of the private sector in the Algerian economy outside hydrocarbons sector and reached achievements in addition to identifying all of the constraints and obstacles to his contribution with the suggestion of some of the solutions that we see effective for activating the role of the private sector in economic diversification in Algeria .Private sector, economic Diversification and fuel sector, business climate.Article