To provide a tomb structure whose durability is enhanced by preventing condensation from forming from air that may enter it from the outside to prevent stones from being cracked by frozen water and to keep a charnel dry over a long period.

The tomb structure comprises shell stones 1a, 1b, 1c and 1d arranged in the form of a planar frame over a foundation 22; a plurality of support plates 2a, 2b and 2c formed of stone and arranged lengthwise and crosswise inside the shell stones 1a, 1b, 1c and 1d to form four space parts 6a, 6b, 6c and 6d, with the center space part 6d serving as the charnel 4; shredded foam plastics 20 filling the space parts 6a, 6b and 6c between the charnel 4 and the shell stones 1a, 1b, 1c and 1d; a cover stone 10 placed on the tops of these heat insulator-filled parts 21a, 21b and 21c to close the inside of the structure; a prayer stone 8 placed on the top front of the charnel 4; and a tombstone 9 placed on the top rear of the charnel 4.