Abstarct: In this thesis, we are investigating the retractablity and right and left semi-artinianity of skew polynomials rings. Several characterizations of a ring R is given for which any non-zero finitely generated module M is retractable in the sense that HomR(M, N) is non-zero whenever N is a non-zero submodule of M. Such rings are called finite retractable. It is shown that any ring being Morita equivalent to a commutative ring is finite retractable. Also, if the commutative ring is semi-Artinian then any non-zero module is retractable. The class of (finite) retractable rings is shown to be closed under Morita equivalence.