In this paper we discussed the concept of pseudo – complementation * on an almost lattices with 0 is discussed and proved some basic properties of pseudo-complementation*. Also prove that pseudo- complementation*on an AL L is equationally definable. A one to one correspondence between the set of pseudo – complementation on an AL L with 0 and the set of all maximal elements of L is verified. It is also, proved that L* = {a*: a L} is a Boolean algebra which is independent (up to isomorphism) of the pseudo complementation * on L. Key words: almost lattice, pseudo – complementation ,equationally definable class, Boolean algebra and maximal elements