To provide a light source unit which can execute a projection with less consumed power and noise and a projector including this light source unit, a light source unit is provided which includes an excitation light source and a luminescent plate which includes a first luminescent light emitting area on which a resin mixed luminescent material layer containing a resin binder is provided and a second luminescent light emitting area on which a luminescent material containing no resin binder is provided, on to which first luminescent light emitting area and second luminescent light emitting area excitation light from the excitation light source is shone.