The environment-friendly coffin according to the invention comprising a box assembly and a profiled lid assembly covering said box assemblies, with both assemblies being connected to each other by means of connecting elements, is characterised in that the coffin's box assembly (1) comprises a casing (3) made of natural stone plates, plate- shaped flats (10) with tapped bores (11) made in them, fixed to inner or outer surfaces of longer plate side walls (5) of said casing, plate-shaped metal washers (12) with tapped mounting bores (13) fixed to these inner side walls (5) and a tubular element (15) mounted inside casing (3), said element tubular being made of glass fibre mat or metal and fastened to inner surfaces of plate side walls (5) and to bottom (4) made of natural stone slab or made of natural stone slab and plate (27) made of a made of a wood-base material and fixed to said stone slab by means of glue-based sealing mass (17), whereas the profiled lid assembly (2) of the coffin has an outer casing made of natural stone in the form of a solid with bottom cascade- shaped cavity (23) or with trough-shaped cavity (32) with a profile of the truncated pyramid, with a lower side offset in the form of a slab frame (29), where in the inner surface of said casing there is insert (30) made of a wood-base material with the same profile fixed by means of a glue to which glass fibre mat (31) is glued.
