Public sector is often considered to be the most important customer within a country. Using this purchasing power governments can promote sustainable development principles in the public tender process through establishing laws and government guidelines, innovation and also market demand for sustainable services or products. This paper reviews literature about sustainable procurement in the public sector and focuses on the case study of Morocco, to identify efforts made to encourage sustainable procurement especially that the new Moroccan decree of Public Procurement integrated, amongst others, sustainability and environmental protection concerns, ensuring that economic growth goes hand in hand with protection of the environment and social inclusion.