Cognitive linguistics, whose main aim is to investigate different concepts, has become one of the important disciplines of all modern scientific schools. It is comparatively a new branch of an Uzbek linguistic school and much work is expected to be done. The article deals with the study of the concept "foolishness" found in the linguistic systems of Uzbek as well as English. Much attention is paid to the mental representatives of proverbial units fixed in the language system of both nations. 

Cognitive linguistics, whose main aim is to investigate different concepts, has become one of the important disciplines of all modern scientific schools. It is comparatively a new branch of an Uzbek linguistic school and much work is expected to be done. The article deals with the study of the concept "foolishness" found in the linguistic systems of Uzbek as well as English. Much attention is paid to the mental representatives of proverbial units fixed in the language system of both nations.