In view of the key role played by SMEs in stimulating economic growth, the strong contribution to wealth generation, and job creation. Indeed, as part of the policy of restructuring and upgrading SMEs in Algeria, which creates the conditions both for the environment of these economic entities and for their functioning in the process of reviving industrial activities and their development, a set of support structures has been created whose principles and Benefits differ. The aim of this book is to present the genesis of the various structures supporting Algerian SMEs.