1939–40 NHL season

Of the league's seven teams, the Boston Bruins were the best in the 48-game regular season, but the Stanley Cup winners were the New York Rangers, who defeated the Toronto Maple Leafs in the best-of-seven final series 4–2 for their third Stanley Cup in 14 seasons of existence.

[1] Tragedy struck the Montreal Canadiens when Babe Siebert, named coach of the struggling club, drowned along with his daughter in August.

The New York Americans, in financial trouble, decided to trade their star left wing Sweeney Schriner to Toronto for Harvey "Busher" Jackson, Buzz Boll, Murray Armstrong, and minor-leaguer Jimmy Fowler.

The first place Boston Bruins had a new coach in Cooney Weiland, their one-time captain, and were once again led by their Kraut Line, Milt Schmidt, Woody Dumart, and Bobby Bauer as they finished 1–2–3 in overall league scoring.

The third seed Toronto Maple Leafs swept the Detroit Red Wings and Chicago Black Hawks en route to the Stanley Cup Finals.