This thesis is focused on an analysis of British-Canadian relations in 1921-1930, ie. mostly the first two terms of office of the Canadian Prime Minister William Lyon Mackenzie King, who significantly contributed to the change of relations of the oldest British dominion and his mother country. The thesis analyses the position of Canada towards Great Britain and the influence of the then British and Canadian government on the development of mutual relations, which have gone through important changes and led to the greater measure of Canadian independence in the chosen period. Specifically, the thesis will focus on the context of key international events, which had an impact on the British-Canadian relations: the Chanak crisis, the Halibut Treaty between Canada and the United States of America, the King-Byng affair (1926), the Imperial Conference of 1926 and the Canadian activity in the League of Nations.