PURPOSE: To thin a conveyor belt by constituting the conveyor belt by way of folding a lengthy hard elastic sheet in an accordion shape and simultaneously fixing a plural number of enforcing ribsin the direction orthogonal with the lengthy direction and fixing the reinforcing ribs in the circumference of an endless chain with intervals.

CONSTITUTION: An endless chain 18 is suspended between a drive sprocket 14 and a floating sprocket 16 separately provided, and a conveyor is constituted by installing a conveyor belt 20 on this chain 18. The conveyor belt 20 is constituted by folding a hard rubber type lengthy elastic sheet 22 reciprocally in the opposite directions and simultaneously fixing a plural number of reinforcing ribs 24 in the direction orthogonal with the sheet lengthy direction. Additionally, this conveyor belt 20 has a pair of rectlinear conveyance parts 20a and a pair of semi-circular parts 20b to connect these conveyance parts 20a, and the rectlinear parts 20a with burrs are devised to extend by the semi-circular parts 20b.