PROBLEM TO BE SOLVED: To provide a light source device for an endoscope which is capable of obtaining an image of high precision without reducing the quantity of light of a specific wavelength region of white illumination light during both of special light observation and usual observation, and capable of brightening the whole of the image to thereby enable high-degree diagnosis.SOLUTION: The light source device for the endoscope includes a first light source part for emitting the white illumination light, a second light source for emitting narrow band light of a narrower wavelength band, a shaping lens for changing at least one of the shape and size of the luminous flux of the narrow band light, a multiplexing member for multiplexing the white illumination light and the narrow band light, a condensing lens for condensing multiplexed light, an incident end face on which the multiplexed light is incident, a body for multiply reflecting the multiplexed light inside so as to uniformize in-plane light distribution, and an emitting end face for emitting the multiplexed light, and further has a rod integrator for emitting the multiplexed light so as to make the same enter onto a light guide of an endoscope apparatus, and a scattering part arranged on the side of the incident end face so as to scatter the condensed multiplexed light.
