Masiofo La'ulu Fetauimalemau Mata'afa, also known as Fetaui Mata'afa (23 June 1928 – 19 November 2007), was an ambassador and a member of parliament in Samoa.
She was also the wife of Samoa's first Prime Minister, Fiame Mata'afa Faumuina Mulinu'u II.
Their daughter, Fiame Naomi Mata'afa, is a matai high chief and Cabinet Minister in the Government of Samoa.
The honorific title "Masiofo" is the queenly title for the wife of a paramount chief in Samoa.