A production line in which post-processing and attachment of semi-finished products of a plurality of shapes can be carried out efficiently using a general purpose jig pallet which can be communalized on the production line. In a production line comprising a member (D) for retaining a semi-finished product (W) and a mechanism (G1) for opening/closing the retaining member (D), carrying a jig pallet (P) for mounting/taking out the semi-finished product (W) by opening/closing the retaining member (D) through the opening/closing mechanism (G1) to processing units (M1, M2, M3) and performing a predetermined processing of the semi-finished product (W), a mechanism (G2) engaging with the opening/closing mechanism (G1) and driving the retaining member (D) to open/close is arranged along the production line.
