A light source unit and an image projection apparatus are provided. The light source unit includes: a light source part including a light source and a reflective member which reflects light emitted from the light source and an infrared ray dividing part which is provided corresponding to a shape of the reflective member, is spaced apart from the reflective member, and includes a blocking part to block part of infrared rays generated from the light source and passing through the reflective member and a passing part having an opening formed through the blocking part. The image projection apparatus includes the light source unit and a casing accommodating the light source unit.
