Kai Gullmar (pseudonym for Gurli Maria Bergström), (2 April 1905 in Sundsvall – 25 March 1982 in Stockholm), was a Swedish composer, musician, singer and actress.

After her return to Sweden, she settled in Stockholm; she made her debut as a performer in a revue by Ernst Rolf in 1929.

However, Gullmar's parents forbade her from performing on stage, and she started working as a recording artist and composer for HMV instead.

Gullmar soon emerged as one of Sweden's leading composers of schlager music, with entertainers such as Ulla Billquist, Karin Juel, Harry Brandelius and Karl Gerhard recording her compositions.

(1940), Med dej i mina armar (1940), Om du bara ler mot mej nå'n gång (1941), En vårnatt i Wien (1941), En liten smula kärlek (1941), Pythagoras swing (1941), Swing ändå (1941), Blå ögon som förgätmigej (1942), De stora elefanternas dans (1942), Utan mej (1942), Som du vill ha mej (1943), Anna från Dalen gick på Nalen (1948), Bussvisan (1956), I Heidelberg (1956), En viol, monsieur, Jag har en liten melodi, Med käckhet och fräckhet and Ordning på torpet.