To provide a fire preventive sheet used for a fire spread preventive sheet, fire spread preventive cover, fire shutter, etc. for fire prevention having direct fire spread prevention, fire extinguishment function, etc. by using a shape memory alloy.

1) This sheet is a laminated sheet including a refractory thermally insulating layer and a shape memory alloy layer 4, has flexibility deformable according to an object and is so formed that the shape memory alloy expands to a prescribed shape and shuts off the object from the fire when prescribed temperature is attained, thereby preventing the fire spread. 2) Alternatively, the sheet is the laminated sheet including a water absorptive high-polymer material layer 2 capable of absorbing or including at least the applied water and the shape memory alloy layer 4, has the flexibility deformable according to the object and is so formed that the shape memory alloy expands to the prescribed shape and shuts off the object from the fire when the prescribed temperature is attained and that a large volume of the water is absorbed in the water absorptive high-polymer material layer 2 of the laminated sheet by sprinklers, etc. to form hydrous layers, thereby preventing the fire spread.