Provided is a treatment method which enables regeneration of bone tissue even when the size of a damaged site of bone is large. The treatment method comprises the steps of: culturing chondrocytes which have been seeded onto a porous body, or differentiating stem cells having chondrogenic differentiation potential which have been seeded onto a porous body into chondrocytes and culturing the chondrocytes and implanting the porous body having the cultured chondrocytes.
