To ensure required sufficient elasticity, to sort and collect a synthetic resin coil spring as it is as a mere synthetic resin product in the sorting and collection of a resource refuse when equipped in the synthetic resin product, easily produce it by an integral molding using the synthetic resin and provide it at a low cost.

Plural spring coils 1 with the same length, same spiral direction, same diameter and same pitch are assembled each other in a spiral in spiral state and both ends of respective spring coils 1 are integrally molded while linking by a ring 2 respectively. Alternatively, a short coil spring piece 3 of such same direction spiral or different direction spiral is integrally molded at a state layered into plural layers.