In this paper we present invariant submanifolds of an almost ®-cosymplectic
(k; ¹; º)-space. Then, we gave some results for an invariant submanifold of an almost
®-cosymplectic (k; ¹; º)-space to be totally geodesic. As a result, we have discovered
some interesting conclusions about invariant submanifolds of an almost cosymplectic
(k; ¹; º)-space.