Solid-state laser device and image display device

The invention provides a solid-laser device. A semiconductor laser beam source (10) emits a laser beam for pumping. An optical resonator (2) includes a solid-laser crystal (15) excited by the entrance of the laser beam and oscillating a fundamental wave (20) and a pair of fundamental wave reflective films (14, 16) respectively disposed so as to sandwich the solid-laser crystal (15). A wavelength conversion element (18) converts the fundamental wave (20) into harmonics (21, 22). The wavelength conversion element (18) is disposed inside the optical resonator (2) in such a manner that the optical axis of at least one harmonic (22) out of the harmonics (21, 22) generated in the optical resonator (2) is made different from the optical axis of the fundamental wave (20) and the at least one harmonic (22) whose optical axis is made different is outputted in approximately the same direction as the other harmonic (21). By this constitution, outputs of harmonics can be stabilized, and plural harmonics can be used without increasing the number of parts.