The aim of this article is an attempt to answer the following questions: how have the contexts of use of the noun demoralization changed in the Polish parliamentary discourse in the last century, and what specific rules of conduct must be exceeded in order for certain actions or attitudes to be described as such. 1885 sentences obtained from the resources of the Polish Parliamentary Corpus, recorded since 1919 until the end of June 2022, were analyzed. The material was divided into three periods (1919–1939, 1945–1989, 1990–2022), and then discussed in the context of topics with which the phenomenon of demoralization was associated in partic-ular time periods. Research has shown that the noun demoralization describes the problems of breaking legal, social and moral norms important in given periods, it can also serve propaganda purposes or strengthen the message presented. However, there are moral standards, the violation of which is not called demoralization.