To provide a composition excellent in biocompatibility to be applicable in medical use, a molding, a medical material, and their manufacturing method.

This composition is manufactured by dispersing a collagen molecule in a bio-absorptive polymer (e.g., polylactic acid), this molding is one wherein the composition is made into a film, a board, a bar, a cylinder, a fiber, a net, a bag, a block, a woven fabric, or a nonwoven fabric, and this medical material is one selected from the group consisting of a nerve regeneration guide tube, an artificial spinal cord, an artificial esophagus, an artificial trachea, an artificial blood vessel, an artificial valve, an artificial medical alternative film such as an artificial cerebral dura mater, an artificial ligament, an artificial tendon, a suture for surgery, a supplement material for surgery, a reinforcing agent for surgery. a wound protection material, an artificial skin, and an artificial horny coat, using the molding.