A light emitting device including an insulation unit, a light emitting region including first, second, and third LED stacks each including first and second conductivity type semiconductor layers, a first pillar electrically connected to the first conductivity type semiconductor layers of the first, second, and third LED stacks, and a second pillar, a third pillar, and a fourth pillar electrically connected to the second conductivity type semiconductor layers of the first, second, and third LED stacks, respectively, an intermediate first connector and a lower first connector respectively electrically connecting the first conductivity type semiconductor layers of the second LED stack and the third LED stack to the first pillar, in which the insulation unit have four corners, and the first, second, third, and fourth pillars are disposed near the four corners covering a side surface of the insulation unit, respectively.