The ILO’s recognition of the social and solidarity economy (SSE), with an internationally accepted definition, pointed out its important role in achieving sustainable development goals, which aim at fostering inclusive and sustainable economic growth, employment and decent work for all, and reducing inequalities. This article stresses the essential role of cooperatives in achieving the objectives of sustainable development and decent work. It clarifies the relationships among the social and solidarity economy, corporate social responsibility, and responsible business conduct. It shows why the SSE, which consists of value- and principle-driven/based units, is particularly relevant to improving accountability in business and society. This article especially focuses on the contribution of SSE businesses to decent work using examples from different ILO reports in a qualitative and thematic approach. It proposes some critical thoughts on the cooperative model and recommendations for reinforcing commitments to the achievement of sustainable development goals. Keywords: sustainability; SSE; cooperative; transition; decent work