A producing method of a wired circuit board includes the steps of preparing the wired circuit board, placing the wired circuit board on a support table, and applying light from above the wired circuit board toward the wired circuit board, and sensing pattern reflected light, table reflected light and foreign-matter reflected light to inspect the conductive pattern and the foreign matter based on a contrast therebetween. In the step of inspecting the conductive pattern and the foreign matter, a reflectance of the table reflected light is in a range of 25 to 55%, and a reflectance of the foreign-matter reflected light is in a range of not more than 10%.