Abstract: A light-emitting device of an embodiment of the present disclosure includes: an insulating layer having a first surface and a second surface that are opposed to each other; multiple columnar structures each including a columnar crystalline structure of a first electrically-conductive type erected in a direction perpendicular to the first surface of the insulating layer, and an active layer and a semiconductor layer of a second electrically-conductive type that are stacked in this order on a side surface and a top surface of the columnar crystalline structure; and a light-blocking member provided between the multiple columnar structures and having an inclined surface of less than 90° relative to the first surface.