To provide a method for producing a damping sheet in which a polyethylene terephthalate film can be laminated during the molding of the damping sheet and which can unify processes and makes the damping sheet exhibit good damping performance.

The damping sheet in which a damping layer 6 and the polyethylene terephthalate film 7 are laminated is obtained by a process in which a resin composition 1 containing rubber or a thermoplastic elastomer, a thermoplastic resin, and inorganic powder is charged between the first roll 2 and the second roll 3, heated, rolled, and let to the third roll to make the damping layer 6. When the damping layer 6 is inserted between the third roll 4 and the fourth roll 5, the polyethylene terephthalate film 7, which is prepared in advance, is inserted simultaneously, heated, and rolled.