Abstract:  We study a Riemannian manifolds M with a f-structures.If the tangent bundle of the Riemannian manifolds is TM=DDdimD=2P,dimD=q=n-2p≥1.We can  define  a  gener- alized contact manifolds,get some property of it.

Key words:  , Riemannian manifolds, contact manifolds, killing vector field, f-structures