Soldering head for laser

PROBLEM TO BE SOLVED: To achieve adjustment of a spot diameter of a laser beam to be projected on a soldering object, without relatively changing a distance between a soldering head and the soldering object, and without affecting imaging of the soldering object with a CCD camera.SOLUTION: An incident light lens 20 movable in an optical axis L1, a semi-transparent mirror 23 inclining by 45 degrees to the optical axis L1 and a condenser lens 22 fixed to a constant position are provided in a prescribed arrangement inside a housing 10, a CCD camera 5 for capturing an image of a soldering object 4 via the semi-transparent mirror 23 and the condenser lens 22 is attached to the inside of the housing 10, and the housing 10 is provided with a position adjustment mechanism 28 for adjusting a position of the incident light lens 20. The position of the incident light lens 20 is adjusted in the optical axis L1 using the position adjustment mechanism 28, so that a diameter of a spot S of the laser beam 3 projected on the soldering object 4 can be adjusted.