Laser light source device, illumination device, image display device, and monitor

A laser light source device comprising:

• a light source;
• an external resonator constituting a resonator structure with the light source;
• a wavelength conversion element disposed between the light source and the external resonator, and converting the wavelength of the light emitted from the light source;
• a base member including a recessed portion;
• and
• a first spacing member including a resonator holding frame holding the external resonator so as to maintain a state in which the wavelength conversion element is separated from the external resonator by a predetermined distance,
• the resonator holding frame including a horizontal portion that has a bottom surface, a vertical portion that has a side surface, and a protuberance portion formed in a half spherical form on an opposite side of the bottom surface, the resonator holding frame causing the external resonator to come into contact with the bottom surface and the side surface, and the protuberance portion being fitted into the recessed portion of the base member.