To provide a concrete placing decorative form capable of expressing a design pattern on a concrete-placed surface (skeleton surface), which is conformable to the global environment for recovery and disposal after concrete placing.

This concrete placing decorative form comprises a synthetic resin foamed body-made form body for forming an irregular design including a joint design on a concrete surface, and a synthetic resin-made cover sheet for covering the irregular design surface of the form body in non-adhered state. The synthetic resin foamed body-made form body and/or the synthetic resin- made cover sheet are biodegradable.