Does the intermediation on labor market reduce informality? This paper examines the effects of Action Plan for Promoting the Employment and Fighting the Unemployment adopted by the Algerian government in 2008 on the informality. Using the cross section data derived from household workforce surveys conducted by the ONS from 1997 to 2010, and Difference-in-Difference estimator that measures the difference in the before and after the intervention on the labor market, we identify the impact on the probability to occupy an informal employment for the employee, and the impact on the administrative and taxes registration of the enterprise for the self-employment.