To provide a coffin which is assembled easily, and requires no wide space for preservation, whose outer surface is not bedewed even when dry ice is put inside and further, and where body fluids flowing out of the dead are not leaked outside.

Both side face parts 4 and 4 can be errected while being linked through V grooves 7 to a base part 3, recessed parts 11 are formed at the front and rear ends of the base part 3 and side face parts 4 and 4, a front face part 5 and a rear face part 6 are stuck by forward and backward extending a nylon sheet stuck on the upper surface, both the side face parts 4 and 4 are errected while vertically attaching the front face part 5 and rear face part 6 to the front and rear ends of the base part 3, and projecting parts 12 provided on both the sides of front and rear face parts are fitted and attached to the recessed parts 11 of the side face parts 4 and 4.