FLAMEPROOF LEATHER

PROBLEM TO BE SOLVED: To provide natural leather to which new flameproofing treatment is performed, and natural leather to which flameproofing treatment is performed, having a coating layer to which new flameproofing treatment is performed.SOLUTION: The flameproof-treated natural leather is provided, wherein flameproofing treatment is performed by coating a composition including a guanidine phosphate flame retardant on the front face and/or the back face of natural leather and perfusing the composition into the natural leather, which is produced by undergoing a preparation step, a tanning step using a tanning agent, a retanning step, a dyeing step, a stuffing step, a setter step, a drying step, a humidification step, and a vibration step. The flameproof-treated natural leather in which a flameproof-treated base coat layer and a flameproof-treated top coat layer are formed is provided, wherein the base coat layer and the top coat layer comprising polyurethane including an aromatic condensed phosphate ester are formed on the surface of the flameproof-treated natural leather.