The article examines the stereotypes of the Ukrainian, Russian and Lithuanian linguo-cultures of cooperative communicative behaviour in the context of cognitive and communicative categories of cooperativity. The process and mechanisms of stereotyping the national communicative behaviour have been characterized, the individual and collective stereotypical impressions about the concept of “cooperativity”, as well as the cooperative linguistic individual in Ukrainian, Russian and Lithuanian communicative cultures have been identified on the results of empirical research (due to the socio- and psycholinguistic experiments). The universal and national specific parameters of auto- and hetero-stereotypes of Ukrainian, Russians and Lithuanians on their level of cooperativity in communication have been established.