This chapter explores the concept of “monstrous motherhood” as a cultural construct that defines by contrast normative maternal behaviour. The monstrous mother is characterised as resisting decentred subjectivity, the expected self-effacement of women in patriarchal systems. Drawing on mythology, literature, and popular culture, the paper analyses various forms of monstrous motherhood, from literal representations in ancient myths to metaphorical ones in fairy tales and modern media. The author argues that these negative representations serve to reinforce cultural expectations of maternal self-sacrifice and unconditional care. The monstrous mother emerges as a figure who prioritises her own subjectivity over the needs of her offspring, thus challenging the patriarchal ideal of motherhood. The chapter examines different types of monstrous mothers–aggressively hostile and manipulative–and shows how these archetypes persist in contemporary culture and continue to shape social attitudes towards motherhood.