The research is aimed at developing a model of a linguo-cognitive thesaurus of the translator in the field of professional communication. The subject of the research is the translator’s discursive activity in situations of professional communication. The research is based on the modeling method. The model of the professionally oriented translator’s thesaurus is built in accordance with such characteristics as inherency, structural unity, sufficiency in the given circumstances, accuracy, focus on results. The research resulted in the creation of the model of the professionally-oriented thesaurus, the structure and content of which are focused on the formation of the qualification characteristics of the translator carrying out professional activities in situations of institutional interaction of representatives of different national languages and cultures. The model of the linguo-cognitive thesaurus of the translator in the field of professional communication is represented by discursive, strategic, rhetorical, linguo-cultural, subject and technical components. The structural unit of the knowledge that makes up the content of the proposed model is a verbalized or non-verbalized concept which meaning is embedded in the semantic space of professional discourse. The undertaken research made it possible to present the linguo-cognitive thesaurus of the translator in the field of professional communication as a system of cultural and professionally oriented knowledge of the linguistic and extralinguistic plan, which underlie the translator’s ability to carry out discursive activities in situations of intercultural professional communication.