This synthesis report comprises of the proceedings of the 4th Regional Forum on Sustainable Agricultural Mechanization in Asia and the Pacific, held on 23-25 November 2016 in Hanoi, Vietnam. It was prepared by a team at the Centre of Sustainable Agricultural Mechanization (CSAM) under the overall guidance of Dr. Li Yutong, Head of CSAM. The presentations and speeches were provided by participants and speakers of the forum.