To provide a laser fixing device that provides sufficient fixing and suppresses the occurrence of a void, while suppressing unnecessary power consumption, and an image forming apparatus including the laser fixing device.

A laser fixing device according to the present invention includes: a light irradiation part; a division optical system that divides light into a plurality of divided light; and an irradiation optical system that is arranged so that each of the plurality of divided light irradiates a separate position on a recording paper.