The invention relates to a lighting device and a projector, which can miniaturize the device, has good light utilization efficiency and even luminous intensity in the illuminated region. The lighting device includes: a light source (10) which emits light around a light source axis; a reflector (11) which has a plurality of reflection surfaces (111-114) for reflecting light emitted from the light source; a plurality of converging units (121-124) each of which is provided for the corresponding reflection surface of the plural reflection surfaces to receive light released from the corresponding reflection surface; and a stacking system which stacks light having passed the plural converging units on a light receiving area wherein each of the plural reflection surfaces (111-114) is formed by apart of a spheroid having focuses at the position of the corresponding converging unit (121-124) and the position of the light source, and each focal distance of the plural converging units (121-124)becomes longer as the distance between the position of the converging unit (121-124) and the light source axis (1A) increases.