The organ was built in 1925 by Juan Dourte and Lope Alberdi, in the workshop of Nuestra Se'ora de Bego'a. It has been preserved in its original state, except for the pedaler, which was replaced by Albert Blancafort in 2011 by one of more standardized sizes. It is an instrument conceived for a strictly liturgical purpose. It has the sound and aesthetics of the romantic organ, as it corresponds to the time of its manufacture.