To provide a method for manufacturing a continuous pocket coil spring line without requiring forming of unpleasant unevenness at the upper end or lower end of coil springs.

The method for manufacturing the continuous pocket coil spring line includes: a step of forming two upper and lower layered belt-shaped sheet materials 10 and 11 of a half or approximately half width by folding an air-permeable belt-shaped sheet material 1 at the center in the width while conveying the belt-shaped sheet material 1 in the longitudinal direction; a step of compressing the height of a coil spring 7; a step of sequentially inserting compressed coil springs 7 into an opening 1D formed on a side surface of the folded belt-shaped sheet material 1; a step of closing and welding the opening 1D; and a step of welding a space between adjacent coil springs 7. The method for manufacturing the continuous pocket coil spring line further includes a step of forming overlapping parts in ends 10a and 11a of the upper belt-shaped sheet material 10 and the lower belt-shaped sheet material 11 by respectively folding the ends 10a and 11a on the opening 1D side of the belt-shaped sheet material 1 folded into the two upper and lower layers when the opening 1D is closed; and a step of closing the opening 1D by welding the overlapping parts.