A Kahler solvmanifold is a connected Kahler manifold (M, j, [ , ]) adm
itting a transitive solvable group of automorphisms. In this paper we
study the isomorphism classes of Kahler structures (j, [ , ]) turning
M into a Kahler solvmanifold. In the rase when (M, j, [ , ]) is irredu
cible and simply connected we show that any Kahler structure on M, hav
ing the same group of automorphisms, is isomorphic to (j, [ , ]) .