The invention discloses a light projecting unit for an endoscope, which prevents the uneven hues when a fluorophor is stimulated by blue light to generate white light, and improves the utilization efficiency of the blue light. A first blue laser having a central wavelength of 445nm performs an incidence toward the fluorophor (50) via a light guiding pipe (24a). In the fluorophor (50), a part of the incident first blue laser is adsorbed by a fluorescent substance to emit fluorescent light, and the part of the first blue laser, which is not adsorbed by the fluorescent substance, generates disffusion via a filler (50a) to enlarge the diffusion angle. The fluorescent light emitted from the fluorophor (50) and the first blue laser perform the incidence into a concave lens (51). The disffusion angle of the first blue laser is further enlarged, thus, the disffusion angle of the first blue laser is consistent with the disffusion angle of the fluorescent light. The combined wave light of the first blue laser and the fluorescent light emitted from the concave lens (51) turns into the white light to irradiate toward the object to be detected.
