Nelson Oswaldo Chui Mejía (born 20 September 1947 in Chimbote) is a Peruvian engineer, agronomist and politician.
He received his primary studies at Sacred Heart College of Chimbote and secondary education in the G.U.E.
In 1965, he entered the Universidad Nacional Agraria La Molina, studying Agricultural Engineering.
He has worked in the Cooperativa Andahuasi, and was Manager of Agrícola Santa Mónica, Servicentro Huaura SA and Proagro EIRL.
He has also been President of the Chamber of Commerce of Huaura Province for 30 June 1998 to 31 May 2003, Secretary General of the Chamber (31 May 2002 – 30 April 2006) and Vocal Committee to Support the National Police of Peru and President of ProHuaura.