COMPONENT MOUNTING LINE, COMPONENT MOUNTING METHOD AND SCREEN PRINTING APPARATUS

PROBLEM TO BE SOLVED: To provide a component mounting line, and the like, capable of performing screen-printing for different types of substrate concurrently, without requiring a complicated substrate supply system.SOLUTION: The screen printing apparatus includes two screen printers 11A, 11B each including a substrate carry-in section 12 where a substrate 4 is carried in from the upstream side of a component mounting line 3, a print executing section 13 for executing printing on the substrate 4 thus carried in, a substrate carry-out section 14 where the printed substrate 4 is carried out to the downstream side, and a substrate movement stage 15 for receiving the substrate 4 thus carried in, positioning the substrate 4 for the print executing section 13 and moving the printed substrate 4 to the substrate carry-out section 14. Two substrate carry-in sections 12, two print executing sections 13 and two substrate carry-out sections 14 are provided at positions symmetric with respect to a vertical symmetric plane S extending in the substrate 4 transportation direction of the component mounting line 3, and the print executing section 13 is provided at a position separated farther from the vertical symmetric plane S than the substrate carry-out section 14.