To provide a couch coffin with a tatami mat containing charcoal such as bamboo charcoal and capable of absorbing an order.

The main body of the coffin comprises a coffin box 3 and a cap 4. The coffin tatami mat of the same rectangular shape is laid and fitted into the coffin box. A tatami mat floor 5 consisting of a board of natural wooden fibers is formed at the bottom in the main body of the coffin tatami mat. The charcoal 6, such as the bamboo charcoal, is applied or laid on the surface in the upper part of the tatami mat floor and a natural tatami mat front 7 and tatami mat edges 8 subjected to antimicrobial or other treatment are applied stop the same.