To provide a fire resistant sheet for inflammable piping which can be easily mounted to inflammable piping which has been laid and installed in a through hole of a fire fighting zone, can extend from a portion within the through hole to the outside and can strongly and surely cut off the piping in case of fire.

The fire resistant sheet for inflammable piping is wound around inflammable piping within a through hole in a fire fighting area section, presses and closes the piping with a thermal expansion force of a fire resistant thermal expansion material in case of fire. Along an upper edge of a flexible and approximately rectangular inorganic fiber sheet containing thermal expansion material, a long fire resistant thermal expansion material having a rate of thermal expansion greater than that of the inorganic fiber sheet is disposed. These inorganic fiber sheet and fire resistant thermal expansion material are encapsulated with aluminum glass cloth to be formed into an encapsulated body. Along a side edge of the encapsulated body, a tab for sticking to a peripheral surface of piping is extended and formed, and an adhesive layer is provided at a position corresponding to the fire resistant thermal expansion material, on an outer surface of the encapsulated body.