In one aspect of the present disclosure, a laser marker includes a supporter, a movable portion, at least one laser optical source, a tilt sensor, a first actuator, and a controller. The movable portion is tiltably supported by the supporter. The tilt sensor is provided to the movable portion, detects a first tilt of the movable portion, and outputs a first detection value that indicates the first tilt. The first actuator changes a tilt of the movable portion with respect to the supporter. The controller controls the first actuator such that a center value of a first series of detection values and a reference value coincide with each other.