A leaded component held by suction nozzle is imaged under three types of imaging conditions, imaging in a state illuminated by laser illumination, imaging in a state illuminated by incident illumination, and imaging in a state illuminated by side illumination and incident illumination 114. In a case in which it is not possible to appropriately recognize a position of a lead by recognition processing using image data of the first set of imaging conditions, recognition processing is performed again using image data of a second set of imaging conditions different to the first set of imaging conditions. In a case in which it is not possible to appropriately recognize a position of a lead by recognition processing using image data of the second set of imaging conditions, recognition processing is performed again using image, data of a third set of imagine conditions different to the second set of imaging conditions.