Using the fixed point method, we prove the generalized Hyers-Ulam stability of the following additive-quadratic-cubic functional equation f ( x + 2 y ) + f ( x − 2 y ) = 2 f ( x + y ) − 2 f ( − x − y ) + 2 f ( x − y ) − 2 f ( y − x ) + f ( 2 y ) + f ( − 2 y ) + 4 f ( − x ) − 2 f ( x ) in fuzzy Banach spaces.