a light emitting unit including plural kinds of light emitting elements with different light emitting wavelengths , wherein , among the light emitting elements , at least one kind of light emitting element includes a semiconductor layer configured by laminating a first conductive layer , an active layer and a second conductive layer and having a side surface exposed by the first conductive layer , the active layer and the second conductive layer ; a first electrode electrically connected to the first conductive layer ; a second electrode electrically connected to the second conductive layer ; a first insulation layer contacting at least an exposed surface of the active layer in the surface of the semiconductor layer ; and a metal layer contacting at least a surface , which is opposite to the exposed surface of the active layer , in the surface of the first insulation layer , and electrically separated from the first electrode and the second electrode .