Attitudinal theory from the social psychology has been widely used in developing persuasive information technology and services in conjunction to shape or change user’s attitude or behavior. Persuasion is the essence in building trust. The nature of this article is conceptual-theoretical where it discusses how emotion approach can be used to make people trust persuasive application. This article describes the three components; persuasive technology, trust, and emotion individually and the relation between them. Moreover, a conceptual model with related elements is proposed to show the relationship between those components.