This article analyzes the activities of Soviet diplomacy in Norway and Sweden during the interwar period and the role of Alexandra Mikhailovna Kollontai in the development of Soviet-Norwegian and Soviet-Swedish relations during those years. Between 1923 and 1930 and in Sweden from 1930 to 1945 Kollontai was chief of the Soviet diplomatic mission in Norway. Kollontai actively established contacts and promoted initiatives that could enhance the prestige of the Soviet Union. She possessed a tremendous capacity for work and open-mindedness. Kollontai always remained loyal to her country. However, she had an independent mind and did not hesitate to voice her own opinion and give advice to her superiors.