Mariasun Landa Etxebeste (born 5 June 1949 Rentería, País Vasco) is a Spanish writer.

She then worked as a teacher of Basic Education for several years, in Zarauz, where she was also the director of the writer Anjel Lertxundi and in Lasarte-Oria.

With elephant bird heart was selected for the list of Whitebirds 6 for the year 2001, that compiles the International Library of Children's Book and Juvenile of Munich.

In 2003, she won the National Prize for Children and Youth Literature of the Ministry of Culture of Spain with the same work A crocodile under the bed originally written in the Basque language.

On 11 October 2016 the Galician PEN Center, dedicated to homage from the Galician language and literature the neighboring languages and literary systems: Hispanic, Basque, Catalan and Portuguese, awarded her the Rosalía de Castro Prize to Mariasun Landa for her work in Basque.