A light-emitting device is provided. The light-emitting device comprises: a first body unit including a base part and at least three conductive patterns positioned on the base part while including a plurality of element loading areas; and a plurality of light-emitting elements positioned on the plurality of element loading areas of the first body unit, wherein at least one conductive pattern among the conductive patterns is electrically connected to at least two light-emitting elements, the at least two light-emitting elements are connected to each other in series, at least two conductive patterns among the conductive patterns include pad electrode areas, an area of the plurality of conductive patterns is 80% or more of an upper surface area of the base part, and a separation distance among the plurality of conductive patterns is 200 μm to 2,400 μm.