A component manufacturing method includes a step in which a robot for attachment gripping a long frame presses the frame against a tabular skin and a step in which, in a state in which the frame is pressed against the skin, a robot for riveting gripping a first rivet inserts the first rivet into a first through-hole formed in the skin and a second through-hole formed in the frame. In the step, the robot for riveting changes a position in the gripped first rivet in a direction perpendicular to an axial direction of the first rivet according to a force received by the first rivet from the skin or the frame.