A light source apparatus comprising: a light source arranged to emit exciting light ; a collimator lens arranged to cause the exciting light emitted by the light source to become mostly parallel exciting light ; a dichroic mirror arranged to reflect said mostly parallel exciting light ; a metal member ; a condenser lens arranged to converge said reflected exciting light onto the metal member to input the converged exciting light to the metal member ; wherein said metal member has a concave portion at a portion to which said converged exciting light is input, and phosphor to generate phosphor light from said exciting light is coated in said concave portion; the light source apparatus further comprises an optical device to guide said converged exciting light converged by said condenser lens to said phosphor in the metal member , and to transmit the phosphor light from said phosphor to said condenser lens , wherein said optical device is arranged at a portion where said phosphor light generated in said concave portion is emitted and has a taper shape which is narrowed toward said metal member , the phosphor light from the metal member being reflected a plurality of times within the taper shaped optical device , so that the phosphor light exits at a predetermined angle in an outgoing portion of the optical device ; wherein the phosphor light is introduced from said optical device to said condenser lens ; said condenser lens is arranged to cause said generated phosphor light to become mostly parallel phosphor light and to introduce the parallel phosphor light into the dichroic mirror ; said dichroic mirror has a characteristic to reflect said exciting light and to transmit said mostly parallel phosphor light ; and the width of the parallel phosphor light beam exiting from the condenser lens and transmitted by the dichroic mirror is larger than the width of the parallel exciting light beam exiting from the collimator lens and reflected by the dichroic mirror . a light source arranged to emit exciting light ; a collimator lens arranged to cause the exciting light emitted by the light source to become mostly parallel exciting light ; a dichroic mirror arranged to reflect said mostly parallel exciting light ; a metal member ; a condenser lens arranged to converge said reflected exciting light onto the metal member to input the converged exciting light to the metal member ; wherein said metal member has a concave portion at a portion to which said converged exciting light is input, and phosphor to generate phosphor light from said exciting light is coated in said concave portion; the light source apparatus further comprises an optical device to guide said converged exciting light converged by said condenser lens to said phosphor in the metal member , and to transmit the phosphor light from said phosphor to said condenser lens , wherein said optical device is arranged at a portion where said phosphor light generated in said concave portion is emitted and has a taper shape which is narrowed toward said metal member , the phosphor light from the metal member being reflected a plurality of times within the taper shaped optical device , so that the phosphor light exits at a predetermined angle in an outgoing portion of the optical device ; wherein the phosphor light is introduced from said optical device to said condenser lens ; said condenser lens is arranged to cause said generated phosphor light to become mostly parallel phosphor light and to introduce the parallel phosphor light into the dichroic mirror ; said dichroic mirror has a characteristic to reflect said exciting light and to transmit said mostly parallel phosphor light ; and the width of the parallel phosphor light beam exiting from the condenser lens and transmitted by the dichroic mirror is larger than the width of the parallel exciting light beam exiting from the collimator lens and reflected by the dichroic mirror . <EOS>