The notion of ternary semigroups was introduced by Lehmer in 1932 and that of fuzzy sets by Zadeh in 1965. Any semigroup can be reduced to a ternary semigroup but a ternary semigroup does not necessarily reduce to a semigroup. A partially ordered semigroup T is called an ordered ternary semigroup if for all x1, x2, x3, x4 ∈ T, x1 ≤ x2 implies x1x3x4 ≤ x2x3x4, x3x1x4 ≤ x3x2x4 and x3x4x1 ≤ x3x4x2. In this paper, we study fuzzy ternary subsemigroups (left ideals, right ideals, lateral ideals, ideals) and fuzzy left filters (right filters, lateral filters, filters) of ordered ternary semigroups.