In the article it is done historiographical and sources study analysis of the material concerning to the activity of the Ukrainian Greek Orthodox Church of Canada (hereinafter referred to as UGOCC). The reasons influenced on its creation are shown. The main of them was the desire of the public activists to give possibility to the immigrants to attend their native church with Ukrainian divine service, deprived the influence of Rome and Moscow. The conditions in which Ukrainians consolidated on the basis of Orthodox religion were analyzed. Orthodox were mainly those who moved from Bukovina and Galicians, that past from Greek Catholic faith to Orthodox. The history of origin and further activity of UGOCC in the interwar period, according to valid norms of the Canadian legislation, is described in the research. The most important problems of the building of UGOCC, such as the lack of priests, searching for a bishop by Ukrainian origin, and the struggle for the recognition of the canonization by the Constantinople Patriarchate are defined. Specific peculiarities of functioning the UGOC on Canadian territory, its ties with the same church in Ukraine are characterized. So, UGOC of Canada gave great significance to the spiritual union with the Ukrainian Autocephalous Orthodox Church (hereinafter referred to as UAOC), on it repeatedly stressed in its councils. UGOCC recognized itself as a part of the UAOC, headed by the Metropolitan Vasyl Lypkivsky. Particular attention is paid to internal conflicts in the interior of the Orthodox church. During the interwar period the discussion question of the canonicity of UGOC of Canada is remained, which Ivan Teodorovych and most of the members of the church`s council aspired to, but a part of the public activists led by V. Svystun was against the connection with the Constantinople Patriarchate and resanctifying the Archbishop, because it would mean «treason» of UAOC in Ukraine and the Kyivan canons of 1921.
Therefore, the article analyzes the main problems of the building of the Ukrainian Orthodox church in Canada in the interwar period as well as the ways to solve them.