Lisa Dahlqvist of Umea IK tries to tackle Arsenal's Rachel Yankey
Arsenal Ladies became the first British club to win the Uefa Women's Cup after a tight and tense second-leg stalemate.
The Gunners rode their luck at times, Umea substitute Ramona Bachmann hitting the post and Marta curling a free kick against the bar.
Home keeper Emma Byrne also brilliantly denied Bachmann, while Jayne Ludlow headed Arsenal's best chance just wide.
But, ultimately, Alex Scott's first-leg winner proved the difference as Arsenal were crowned champions of Europe.
It is the third of four titles the London side are attempting to win in their 20th anniversary season, and it was undoubtedly the finest four in the club's history.
The Gunners were underdogs against Europe's only full-time professional women's team, twice winners of the competition in the last four seasons.
But in their first appearance in the final, Arsenal produced gritty performances in both legs to claim the trophy.
In front of a 3,467 crowd at Borehamwood FC's Meadow Park, they were on the offensive for the majority of the first half, although the best scoring effort came at the other end.
Lisa Dahlqvist fired in a 37th-minute drive that forced keeper Byrne into a diving save.
Arsenal began to regain their momentum after the break, with captain Ludlow heading over the bar from Lianne Sanderson's 64th-minute free-kick.
Ludlow was again unfortunate when her header from winger Rachel Yankey's 69th-minute corner was deflected just wide.
But after a spell of pressure, the Gunners had Byrne to thank once again after the keeper made a fine stop to keep out Bachmann's 15-yard shot.
Bachmann and Marta both sent well-struck shots narrowly over the bar as Umea stepped up their search for a goal to bring the scores level on aggregate.
Teenage striker Bachmann, from Switzerland, was desperately unlucky in the 80th minute, her 18-yard drive rebounding into Byrne's face off a post and bouncing behind for a corner.
Two minutes from time there was another scare for Arsenal, with Marta's 20-yard free-kick cannoning back off the bar.
Nerves were frayed in five minutes of added time, but Arsenal held on to produce an historic result.
Arsenal: Byrne; Scott, Grant, Asante, Phillip; Carney, Chapman, Ludlow (White 90), Yankey, Sanderson, Fleeting.
Subs not used: Tracy, Champ, Larkin, Davison, Spencer, Flaherty.
Umea: Soberg; Paulson, Westberg, Frisk, Bergkvist; Dahlqvist (Edlund 55), Estrella Moura, Ma (Bachmann 72), Klaveness; Marta, Ljungberg.
Subs not used: Ronnlund; Berglund, Karlsson, Pedersen, Bergkvist.
Referee: Ms. Petignat.