Kant accuses bad rhetoric of being a deceitful art. In this article, I give an account of both what it means for Kant that bad rhetoric deceives and how this art deceives in the first place. Additionally, I explore significant moral and aesthetic repercussions of bad rhetoric’s being deceitful. The article is structured into Part A and Part B. I start by reconstructing Kant’s technical definition of deception as disagreement between the semblance and the cognition of truth. I go on (...) to argue that bad rhetoric deceives by promising more than it provides. I show that bad rhetoric deceives technically. In Part B, I identify a distinctive trait of deception in bad rhetoric. By exploring this trait, I shed light upon Kant’s moral criticism of bad rhetoric, and I ultimately suggest Kant’s perspective on the appropriate aesthetic response to this art. (shrink)