In this paper, we carry out the Hyers- Ulam Stability of duodecic functional equation equation in Multi-Banach Spaces by using fixed point method. In 1940, Ulam posed a problem concerning the stability of functional equations Give conditions in order for a linear function near an approximately linear function to exist. An earlier work was done by Hyers in order to answer Ulams equation on approximately additive mappings.During last decades various stability problems for large variety of functional equations have been investigated by several mathematicians.