The present invention provides a method, etc., for manufacturing a molded article containing calcium octavus phosphate having a volume of 2.0 mm3 or more, the method being characterized in that: a precursor ceramic composition that includes Ca and/or PO4, has a solubility in H2O greater than that of calcium octavus phosphate, and has a volume greater than 2.0 mm3, is immersed in a solution including a composition not included in the precursor ceramic composition, among compositions of Ca, PO4, and H2O that are compositions of calcium octavus phosphate； the precursor ceramic composition is reacted； and at least a part of the precursor ceramic composition is converted into calcium octavus phosphate.
