In this paper, we investigate the notions of the left (right, twosided) ? - T L-ideals and (?, s) - T L-ideals in a semigroup, as well as some of their related properties. Furthermore, the results of relative T Lideals are applied to L-ideals of semigroups. AMS (MOS) Subject Classification Codes: 03E37; 06B23; 20M12