Abstract Parliamentary debates are characterized by constant conflict of opposing discourses in the struggle for positions, resources and political power. This rhetorical conflict, which is often more performed than real, aims, among others, to undermine the image of the political rivals and to question their professional, political and moral legitimation. From the theoretical perspective, the questioning of identities and the face-threats are essential to this practice. They concern not only the individual face-threats, but the verbal attacks target frequently qualities related to the group-face (Spencer-Oatey 2009). However, these face threats form part of the parliamentary performance (staging) and the political rivals, unlike in the everyday interaction, seldom take a real offence which could seriously harm the interpersonal or intergroup relations (cf. Harris 2001: 468). The research is conducted applying the pragma-rhetorical approach to parliamentary discourse which have proved useful in several studies of parliamentary discourse (Ilie 2003, 2010a, b, Ionescu-Ruxăndoiu 2010, 2012). However, some structual levels had to be added to Ilie’s approach in order to use its whole potential and convey the interplay of the different discourse levels in the parliamentary talk. By this endeavour, the approaches of Klein (1998) und Blas-Arroyo (Blas-Arroyo 2011) were also helpful. This article aims to list delegitimization strategies used in the Czech Parliament. The main focus is on the strategies by which the fellow MPs are accused of lying, clientelismus or by which their moral and intelectual capabilities are put in question.