Cartilage/bone inducing materials for reparation which contain a bone inducer and polyoxyethylene polyoxypropylene glycol. In a particularly preferable example, the molecular weight of the polypropylene glycol constituting the polyoxyethylene polyoxypropylene glycol falls within the range of from about 1,500 to 4,000, the weight ratio of the ethylene oxide units falls within the range of from about 40 to 80 %/molecule, and the concentration of the polyoxyethylene polyoxypropylene glycol is about 10 to 50 % based on the aqueous solution. These materials are used in the cartilage/bone induction method without requiring any operation. Because of being composed of a bone inducer and a carrier which is easily absorbed in vivo, highly compatible with the bone inducer and undergoes reversible sol-gel change depending on the temperature, they can be highly applicable to fracture and bone-defective sites and thus exert excellent therapeutic effects.