This paper focuses on the demonic character of the waterman (“hastrman”) and its reflection in the tales from Silesia, namely in the area of the Czech Upper Silesia. The author first defines the term superstitious (demonic) tale, and she also deals with one of the types of tales – the Hastrman tales. For a more detailed analysis, the author has selected the unpublished texts of the collector and reteller of folklore Helena Salichová, who dealt with collecting activities mainly in the areas of Kyjovice, Klimkovice and Polanka nad Odrou. These unpublished texts are preserved in the written heritage of Helena Salichová.