A component mounting machine including: a nozzle that picks up a component; sliders and a ball screw that move the nozzle in horizontal and vertical directions; a reel unit that supplies components; a board conveyance device that holds and conveys a board on which components are mounted; a parts camera that irradiates a component held by the nozzle with light to image the component from below; and a controller that performs various control functions, is provided. The controller obtains a clearance height at which an obstacle between the parts camera and a predetermined mounting position on a board can be avoided, extracts from an HDD an imageable range of the component, and sets a target height of a lower surface of the component held by the nozzle when the nozzle passes above the parts camera, such that the target height is closest to the clearance height within the imageable range.