Caretaker Prime Minister Gordon Darcy Lilo has conceded defeat after losing his seat in the country’s election.
It is expected to take at least a week before a coalition Government is formed and a new prime minister is chosen.
Mr Lilo has led Solomon Islands since 2011 and has been a member of parliament for three terms.
But he has been beaten in his constituency of Gizo Kolombangara by his 37-year-old nephew, Jimson Tanangada.
The departing prime minister blamed his loss on the late arrival of a passenger boat, carrying several hundred people believed to be loyal to him.
Radio Australia reports, he told the Sunday Star newspaper, he accepted the result.