Deception and humor are ubiquitous in interpersonal in-teractions and intricately interrelated. In this article, we review and integrate prior research on humor and deception and propose a theoretical model - the Interpersonal Humor Deception Model (IHDM) - to understand the interpersonal effects of humor on deception. We argue that humor can both promote and curtail the use of deception, as well as influence the detection of deception and responses to detected decep-tion (retraction, retaliation, and the restoration of trust). The specific effects of humor depend on whether it is successful or unsuccessful. In all, our article provides a theoretical frame -work to guide research on humor and deception and offers important insights into the costs and benefits of humor in ne-gotiations, organizations, and everyday life.