Laser device and method for manufacturing laser device

A laser device comprising:

• a rod-shaped laser medium extending in a first direction;
• a first light source unit including a first base and a plurality of excitation light sources attached to the first base;
• a second light source unit arranged side by side with the first light source unit in a second direction intersecting with the first direction, the second light source unit including a second base and a plurality of excitation light sources attached to the second base;
• and
• a holder supporting the laser medium, the first light source unit, and the second light source unit,
• wherein at least one of the first base and the holder includes a first regulating part configured to regulate a position of the first base with respect to the holder,
• wherein at least one of the first base and the second base includes a second regulating part configured to regulate a position of the second base with respect to the first base,
• wherein the holder includes a first holding member and a second holding member arranged side by side in the first direction and a connecting member connecting the first holding member and the second holding member to each other,
• wherein the first light source unit and the second light source unit are disposed between the first holding member and the second holding member, and
• wherein the connecting member has a support surface supporting the first base and the second base slidably in the second direction, the support surface being in contact with the first base and the second base.