Kubilius, 56, was elected the party's chairman for the sixth time late on Monday. He has led the Homeland Union–Lithuanian Christian Democrats since 2003.
Raimundas Alekna, the party's executive secretary, told BNS on Monday night that 4,635 party members voted for Kubilius and 3,891 backed the party's former leader MEP Vytautas Landsbergis.
Just as during the first round of voting, Landsbergis received more support in Lithuania's major cities - Vilnius, Kaunas, Klaipėda and Panevėžys - than Kubilius but the gap was narrower.
Three candidates, including Kubilius, Landsbergis, and Valentinas Stundys, former leader of the Lithuanian Christian Democrats who later merged with the Homeland Union, vied in the first round of voting. Kubilius received 4,383 votes, followed by Landsbergis (3,557) and Stundys (1,588).
The election results will be confirmed at a party caucus scheduled for May 12.
Biggest self-critic
After the results came in, Kubilius said he would take into account opponents' criticism during the election campaign and stressed that he was his own biggest critic.
"I would really like to thank Professor Vytautas Landsbergis for the great opportunity during this competition to highlight problems in our party and state. After this election, the party will come out stronger and better aware of those problems we have to solve. I also believe that the party is coming out of this election as an organization which pays most of its attention to state affairs and attracts more young people, and that renewal will be very specific," Kubilius told BNS on Monday.
"I appreciate criticism as really rational and in fact objectively evaluating both the situation in the party and in the state. And I am the biggest self-critic as I am convinced that we have not done everything we should have. We have not avoided mistakes which were sometimes rather painful," the leader of the conservative party said.
He also thanked both his supporters and those who backed his main rival Landsbergis.
"As I understand that it was not easy to pick one out of two fellow party members, but I appreciate this choice as a mandate to continue those changes and that party renewal I have paid so much attention to all the time," Kubilius said.
In his words, a document defining the identity of the Homeland Union, the party's strategy and challenges will be considered at the party's forthcoming caucus on May 12, and the document "will review the path of the past 20 years and the past four years and will set the direction for further work."