Disclosed is an implantable microparticle in which a transplant is encapsulated with elastic cartilage derived from the subject receiving the transplant. Also disclosed is a method of preparing an implantable microparticle, comprising (1) isolating elastic cartilage from a subject receiving a transplant; (2) multiplying the elastic cartilage through subculture; (3) mixing the elastic cartilage and the transplant, and subjecting a resultant mixture to shaking culture in order to allow the elastic cartilage to become attached around the transplant; and (4) isolating microparticles in which the transplant is encapsulated with the elastic cartilage.