The 1939–40 Divizia B was the sixth season of the second tier of the Romanian football league system.
The format has been maintained, four series of 10 teams. The winners of the series were supposed to promote in the Divizia A, but the winners of the 3rd and 4th series were not promoted from different reasons. Also 3rd and 4th place from the first series and the sixth place from the second series were promoted to fill the vacant places from Divizia A.
Team changes
To Divizia B
Promoted from Divizia C
Astra-Metrom Brașov
CFR Turnu Severin
Cimentul Turda
Electrica Timișoara
Feroemail Ploiești
Maccabi Chișinău
Mica Brad
Muncitorul Cernăuți
Oltul Sfântu Gheorghe
Sparta Mediaș
SS Doc Galați
SSM Reșița
Relegated from Divizia A
Chinezul Timișoara
Tricolor Ploiești
Gloria Arad
From Divizia B
Relegated to Divizia C
CFR Brașov
Luceafărul București
Hatmanul Luca Arbore Radăuți
Unirea MV Alba Iulia
SG Sibiu
Mociornița Colțea București
Jahn Cernăuți
Șoimii Sibiu
Tricolor Baia Mare
Promoted to Divizia A
CAM Timișoara
Unirea Tricolor București
Gloria CFR Galați
Renamed teams
Dacia Unirea Brăila was renamed as FC Brăila.
Monopol Târgu Mureș was renamed as CS Târgu Mureș.
Sporting Chișinău was renamed as Nistru Chișinău.
Disqualified teams
Mihai Viteazul Chișinău and Textila Moldova Iași were disqualified.
Other teams
Craiovan Craiova and Rovine Grivița Craiova merged, the new formed team was named FC Craiova.
