To provide a lighting device for image capturing in an electronic component mounting apparatus that has small dimensions in the height direction and a small size in a plan view and thus can meet demands in a reduction in size.In an electronic component mounting apparatus, a surface lighting unit 30 that emits illumination light to a substrate, which is an object whose image is to be captured by a camera 25, includes as a main component a flat lighting substrate 31 that is provided between the camera 25 and the substrate, which is an object whose image is to be captured, so as to be substantially parallel to the surface of the substrate. Upper illumination light sources 32a, intermediate illumination light sources 32b, and lower illumination light sources 32c are arranged around an opening 31a for image capturing on one surface of the lighting substrate 31 facing the substrate in this order from the inside to the outside, such that they emit illumination light components to the surface of the substrate at different emission angles. In this way, it is possible to reduce the dimensions of the surface lighting unit 30 in the height direction and thus meet demands for a reduction in size.