Abstract: A conveyance system, wherein dividable horizontal conveyance units are connected to each other through joint plates and a support post and rails of the horizontal conveyance units are connected to each other without any step and clearance. A joint conveyance carnage assembly is conveyed by a force applied thereto from annular chains of the horizontal conveyance units through chain presser plates. When the rearmost one of the chain presser plates leaves the annular chain of the horizontal conveyance unit, the chain presser plate of the headmost first conveyance carriage reaches the annular chain of the horizontal conveyance unit and the joint conveyance carriage assembly is continuously conveyed.