To provide a gravestone for an individual of a first-final generation so that the individual can prepare an own grave to enter when he/she dies in the future, assuming discontinuation of worshipping and succeeding graves of ancestors due to aging population and declining birth rate.

This invention, the ready-to-assemble charnel house integrated type gravestone, is configured in a manner that: a tombstone (1) is inclined to make it easy to confirm a name from the top; the tombstone (1) is put on a footstone (2) serving also as a lid and is fixed with an adhesive; a charnel house front slate (4), charnel house side slates (3) and a charnel house rear slate (5) are assembled and fixed with the adhesive to form a cinerary space; a box assembled with the charnel house slates (3), (4) and (5) is put on a base stone (6) and the lower part is fixed with the adhesive; after cineration, the footstone (2) serving also as the lid attached with the tombstone (1) is put on and tightly fixed with the adhesive; a vent hole (7) is opened on the base stone (6), and a filter (8) is attached to the hole in order to prevent insects from entering.