A component mounting device comprising: a base which holds a printed circuit board (B) so as to be positioned at a mounting position (P3); a movable carriage which is supported so as to be movable in the X axis direction and the Y axis direction with respect to the base ; a mounting head attached to the movable carriage so as to be attachable and detachable with a suction nozzle which sucks a component (EP) supplied from a component supply device and which mounts the component (EP) sucked by the suction nozzle onto the printed circuit board (B) positioned and held at the mounting position (P3) and a recognition camera which is integrally provided with the movable carriage , characterized in that a board recognition optical path which recognizes a board mark (BM) that is provided on the printed circuit board (B) from above and a component recognition optical path which recognizes a component (EP) sucked to the suction nozzle from below are separately provided with respect to the optical axis (O1) of the recognition camera , a first fiducial mark to be captured via the board recognition optical path is provided at a predetermined position on the base side, a second fiducial mark to be captured via the component recognition optical path is provided at a predetermined position on the mounting head side, and a calculation means is provided which calculates a calibration value using a positional relationship of the first and second fiducial marks with respect to the optical axis (O1) of the recognition camera by capturing the first fiducial mark and the second fiducial mark using the recognition camera . a base which holds a printed circuit board (B) so as to be positioned at a mounting position (P3); a movable carriage which is supported so as to be movable in the X axis direction and the Y axis direction with respect to the base ; a mounting head attached to the movable carriage so as to be attachable and detachable with a suction nozzle which sucks a component (EP) supplied from a component supply device and which mounts the component (EP) sucked by the suction nozzle onto the printed circuit board (B) positioned and held at the mounting position (P3) and a recognition camera which is integrally provided with the movable carriage , characterized in that a board recognition optical path which recognizes a board mark (BM) that is provided on the printed circuit board (B) from above and a component recognition optical path which recognizes a component (EP) sucked to the suction nozzle from below are separately provided with respect to the optical axis (O1) of the recognition camera , a first fiducial mark to be captured via the board recognition optical path is provided at a predetermined position on the base side, a second fiducial mark to be captured via the component recognition optical path is provided at a predetermined position on the mounting head side, and a calculation means is provided which calculates a calibration value using a positional relationship of the first and second fiducial marks with respect to the optical axis (O1) of the recognition camera by capturing the first fiducial mark and the second fiducial mark using the recognition camera . <EOS>