Great match hero became Frölunda defender Ebba Westerlind, who decided with a solo effort.
Westerlind skated free and finished a breakout by putting the puck between the legs of Finnish goalkeeper Kerttu Huja-Halkola.
The first goal was also scored by a Frölunda player. Edit Danielsson gave Sweden the lead in the second period, but Finland was able to equalize in a power play in the third period through Senja Siivonen on the team's sixth power play of the match.
Sweden will also face Finland in the men's junior World Championship tonight Swedish time, which is a semifinal.
The women's junior World Championship is a tournament for U18 players and Sweden will face reigning champion USA in their next match on Sunday.
USA started the tournament by winning 6–0 over Japan.