To provide a producing device for an unvulcanized rubber sheet by which in the case of producing a rubber sheet product, efficiency of work can be contrived and also the high-quality rubber sheet product is produced.

The producing device for an unvulcanized rubber sheet is equipped with a sheet formation roll 2 consisting of an extruder 10 and a reduction roll 11, a first carrier part 6 in which an vulcanized rubber sheet 50 rolled in the sheet formation part is cooled, a punching part 3 for punching the cooled unvulcanized rubber sheet to a rubber sheet product and a second carrier part 7 in which an accumulator 17 is provided between the first carrier part and the punching part and stores the carried unvulcanized rubber sheet. Further, the above-mentioned producing device is equipped with a weighing part 4 for weighing the rubber sheet product punched in the punching part, a weight- correcting means 19 for correcting the weight of the rubber sheet product weighed in the weighing part and a third carrier part 8 for carrying the rubber sheet product weighed in the weighing part to the weight-correcting means. Furthermore, an adsorbing and transferring mechanism 18 for transferring the rubber sheet product to the weighing part is provided in the punching part.