Sweden's governing Social Democrats retained the largest number of seats in Strasbourg scoring a total of six, but a massive leap in the support for the Liberal Party saw its share of the vote nearly triple to 13.8%
With a popular candidate in Marit Paulsen, the party ran on a pro-European Union, anti-corruption and environmentalist ticket.
Support also grew, but not quite as dramatically, for the anti-European Union Left Party which took 15.8 % of the vote, up three points on its 1994 performance.
The Social Democrat party saw a modest drop in support as its share of the vote fell by 2% to 26%. Sweden's other main party, the Moderate Party, saw its support fall by three points to 20%.
Following the familiar pattern across the European Union, turnout was low at just under 40%.
"I don't see any reason to view this as a bad result for us, considering the low voter turnout," Prime Minister Goeran Persson told Swedish
"Above all, I feel a real gloominess about the low turnout,
which is a very strong warning signal," he added.