拉康的说话主体理论旨在表明，由于语言化的无意识的在场作用，主体（人）实际上并不具有传统实体式主体所标榜的意识自主性和优先性，而只是一架不停地在说又不知说些什么的说话机器；换言之，人是说话的主体，而非表达的主体。这种主体离心化的倾向也是后现代哲学共同关注的一个话题，只是由于拉康特有的精神分析学背景，使得他的说话主体理论表现为一种极端的反主体主义。 Lacan’s theory of the subject of speech aims to show that due to the unconscious presence of language, the subject (person) does not actually have the autonomy and priority of consciousness advocated by the traditional entity-style subject, Say that they do not know what to say machine; In other words, people speak the main body, rather than the main expression. The tendency of such subjects to be centrifuged is also a topic of common concern to postmodern philosophy, only due to Lacan’s unique psychoanalytic background, which makes his theory of speaker’s subject appear as an extreme anti-subjectivism.