The aim of the article is to analyze the common political dialogue between UVO and Republic of Lithuania politics. The main reason that began the relationship between the Lithuanian establishment and UVO was Lithuanian-Polish conflict over the Vilnius region. Ukrainians and Lithuanians were not satisfied with the orientation towards the Entente states, the geopolitical situation and the value of the lost territory in search of allies. Members belonging to the UVO staged attacks, assaults and sabotage campaigns against the highest Polish state officials. As a result, the Polish secret services began to persecute the organization led by Y. Konovalets. UVO was unable to relocate the organization’s structures to the annexed territories of western Ukraine, colonel Y. Konovalets appealed to Lithuania, which were confronted with Poland – in the hope of receiving help. In Kaunas, one of the representative offices of the organization, code-named Leniwka, otherwise known as the Lithuanian-Ukrainian Society, was formed from Lithuanian intellectuals and politicians together with UVO member Ivan Revjuk. Without Prague and Berlin, Kaunas became an important center for preparing fictitious documents for UVO representatives’ travels to other countries, preparing an uprising in the annexed Ukrainian, Belarusian and Lithuanian territories of Poland, and exchanging information on the political situation in Poland after intelligence operations.