The language of diplomacy, being a kind of official style that performs an important function in public relations between people, is reflected in international relations in the political, cultural, economic and social spheres. This is his extralinguistic feature, which distinguishes diplomatic discourse from other styles, in particular, from other forms of business style. Although the discourse of diplomacy is largely characteristic of the business style, in the individual discourse of a diplomat speaking to the people, there are elements of a conversational style in a communicative situation. This fact is the object of the article’s research. The article examines the directions of studying the concepts of «discourse», «diplomatic discourse», «language of diplomacy», gives an overview of the works of Kazakh, European, Russian scientists, defines the pragmatics of the conversational style in the diplomat’s discourse by lexical and grammatical linguistic units, other linguistic phenomena. As a result of linguistic analysis, it is assumed that the manifestation of the conversational style in the diplomat’s discourse increases the degree of intelligibility to the addressee of such features characteristic of this discourse as the sanctity of the profession, which has the character of serving the state, special personnel and organizational structural management, diplomatic ethics and norms of behavior prescribed by the protocol, a significant amount of professional terminology, special forms of professional communication. The article also gives the discourse of the two diplomats and indicates their linguistic peculiarities.