A light-emitting device comprising: a board; a first light-emitting element and a second light-emitting element interconnected in parallel and provided above a top face of the board; a third light-emitting element and a fourth light-emitting element, one of which is connected in series with the first light-emitting element and the other of which is connected in series with the second light-emitting element, the third light-emitting element and the fourth light-emitting element being interconnected in parallel and provided above the top face of the board; a first metal pattern provided continuously under the first light-emitting element and the second light-emitting element, on an undersurface of the board; and a second metal pattern provided continuously under the third light-emitting element and the fourth light-emitting element, on the undersurface of the board, and isolated from the first metal pattern, wherein the third light-emitting element is connected in series with the first light-emitting element and in parallel with the second light-emitting element, and the fourth light-emitting element is connected in series with the second light-emitting element and in parallel with the first light-emitting element, characterized by a fifth light-emitting element provided above the top face of the board, and connected in series with the first light-emitting element and in parallel with the second light-emitting element; and a sixth light-emitting element provided above the top face of the board, and connected in series with the second light-emitting element and in parallel with the first light-emitting element and the fifth light-emitting element, wherein the first metal pattern is provided continuously below the first light-emitting element, the second light-emitting element, the fifth light-emitting element, and the sixth light-emitting element. a board; a first light-emitting element and a second light-emitting element interconnected in parallel and provided above a top face of the board; a third light-emitting element and a fourth light-emitting element, one of which is connected in series with the first light-emitting element and the other of which is connected in series with the second light-emitting element, the third light-emitting element and the fourth light-emitting element being interconnected in parallel and provided above the top face of the board; a first metal pattern provided continuously under the first light-emitting element and the second light-emitting element, on an undersurface of the board; and a second metal pattern provided continuously under the third light-emitting element and the fourth light-emitting element, on the undersurface of the board, and isolated from the first metal pattern, wherein the third light-emitting element is connected in series with the first light-emitting element and in parallel with the second light-emitting element, and the fourth light-emitting element is connected in series with the second light-emitting element and in parallel with the first light-emitting element, a fifth light-emitting element provided above the top face of the board, and connected in series with the first light-emitting element and in parallel with the second light-emitting element; and a sixth light-emitting element provided above the top face of the board, and connected in series with the second light-emitting element and in parallel with the first light-emitting element and the fifth light-emitting element,