This thesis studies Peter Shaffer&rsquo / s use of time as a technique for creating alienation effect. In order to provide the audience with a questioning role, Shaffer primarily employs historical and mythical past as elements of pastness in the Brechtian sense. Shaffer also innovatively contributes to the formation of alienation effect with spatial time achieved through the coexistence of past and present. Distancing the audience in time, the playwright leads them to adopt a critical viewpoint so that they can question and reflect upon the psychological and metaphysical themes such as search for worship, existential disintegration and the eternal conflict between reason and instinct in his plays The Royal Hunt of the Sun, Yonadab, and The Gift of the Gorgon.