To obtain versatility of a grave by providing a house-shaped grave structure in which an impression of a pet can be intensified.

In a grave in which a plurality of chambers constituting a charnel housing bones are provided to form a house-shape as a whole, respective chambers are provided with a floor wall 10 and side walls 11 and the grave is constituted of a plurality of chamber units B inserted in demarcated spaces of a fixed part 20. One unit of these chamber units B is constituted as an exclusive pet unit B0 provided with imitation pet facilities M for a pet in which a bed, a feeding area, a water zone, and playing tools, for a pet are provided as the imitation pet facilities M. Further, an imitation pet is disposed near the imitation pet facilities M.