An image display apparatus comprising: a plurality of laser beam source portions (2a, 2b, 2c) outputting laser beams of a plurality of color components (R, G, B) different from each other; a synthesized beam generation portion (3, 4) synthesizing the laser beams of the plurality of color components (R, G, B) to generate a synthesized beam; a control portion for controlling outputs of the laser beam source portions (2a, 2b, 2c); a branching unit for branching the laser beams of the color components (R, G, B); and a detection portion for detecting light quantities of the laser beams of the color components (R, G, B) branched by the branching unit, wherein the branching unit has a reflectance or transmittance with increase/decrease characteristics opposite to increase/decrease characteristics of outputs of the laser beams in increasing or decreasing the outputs of the laser beams of the color components (R, G, B) according to changes of wavelengths of the laser beams of the color components (R, G, B) in order to maintain a prescribed color state of the synthesized beam, and the control portion is configured to control the outputs of the laser beam source portions (2a, 2b, 2c) according to light quantities of branched laser beams of the color components (R, G, B) detected by the detection portion, characterized in that the branching unit is so configured that the reflectance or transmittance thereof decreases when wavelengths of a laser beam of a blue color component and a laser beam of a red color component are increased and increases when a wavelength of a laser beam of a green color component is increased, so that a prescribed output ratio between the color components output from the branching unit is achieved in order to maintain the prescribed color state of the synthesized beam. a plurality of laser beam source portions (2a, 2b, 2c) outputting laser beams of a plurality of color components (R, G, B) different from each other; a synthesized beam generation portion (3, 4) synthesizing the laser beams of the plurality of color components (R, G, B) to generate a synthesized beam; a control portion for controlling outputs of the laser beam source portions (2a, 2b, 2c); a branching unit for branching the laser beams of the color components (R, G, B); and a detection portion for detecting light quantities of the laser beams of the color components (R, G, B) branched by the branching unit, wherein the branching unit has a reflectance or transmittance with increase/decrease characteristics opposite to increase/decrease characteristics of outputs of the laser beams in increasing or decreasing the outputs of the laser beams of the color components (R, G, B) according to changes of wavelengths of the laser beams of the color components (R, G, B) in order to maintain a prescribed color state of the synthesized beam, and the control portion is configured to control the outputs of the laser beam source portions (2a, 2b, 2c) according to light quantities of branched laser beams of the color components (R, G, B) detected by the detection portion, the branching unit is so configured that the reflectance or transmittance thereof decreases when wavelengths of a laser beam of a blue color component and a laser beam of a red color component are increased and increases when a wavelength of a laser beam of a green color component is increased, so that a prescribed output ratio between the color components output from the branching unit is achieved in order to maintain the prescribed color state of the synthesized beam.