A lamp for a vehicle includes an array module including a plurality of micro Light Emitting Diode (LED) chips. The array module includes a plurality of regions, where each region includes one or more arrays. Each array includes at least a portion of the plurality of micro LED chips. At least one of the plurality of regions includes arrays that are stacked to each other, where a number of arrays stacked at a first region among the plurality of regions is different from a number of arrays stacked in a second region among the plurality of regions.