PURPOSE: To facilitate installation and movement of an article production line and variation of a process by a method wherein a machining device to machine or assemble articles placed on a conveyance. pallet or a measuring device to measure the physical characteristics of the article are contained in a single casing.

CONSTITUTION: A pair of conveyor devices 25 and 26, a drive motor to drive the moving parts of a pair of the conveyor devices 25 and 26, a conveyance pallet 6 placed on the moving parts of the conveyor devices 25 and 26, machining devices 9a, 11a, 16a, and 24 to perform machining or assembly of articles 30 placed on the conveyance pallet 6 or measuring devices 19, 20b, and 21 to measure the physical characteristics of the article are contained in a single casing 50 to form a unit type article production device 70. A plurality of the production devices 70 are intercoupled and conveyance pallet returning means are arranged to the starting end and the terminal end of a plurality of the unit type article production devices 70 to form an article production line system. This constitution facilitates installation and movement of an article production line and variation of a process.