In the article the author makes an attempt to classify radiodiscourse in according to the existing classifications of discourses. Being a type of oral discourse of mass media it possesses its certain characteristics such as unprepared nature of official speech, tendencies to deterioration of a linguistic norm and an intimate manner of speaking. Moreover, clearly defined roles, specified place and context of communication, chronotope, certain typical discursive formulae allow to define radiodiscourse as an institutional discourse. However, extralinguistic conditions in which radiocommunication takes place bring about such peculiarities of radiodiscourse as distance and mediation, mass nature of audience, omnitude, high information rate, direct connection to time, in particular irreversibility, linearity, continuity. Though radiodiscourse has universal characteristics of both oral mediaand institutional discourses, the named peculiarities make it possible to distinguish it in discourse diversity, where it has a certain quite independent position.