PURPOSE: To execute an elimination by simple washing against a bacterius which intrudes deeply into flaw traces generated by a kitchen knife and adheres thereto by forming the chopping board by adding and mixing thiabendazole by suitable weight % into a synthetic resin or synthetic rubber.

CONSTITUTION: A formed part which comes to an antibacterial chopping board is obtained by adding and mixing 0.05 part thiabendazole being like white powder and being free from a smell into a synthetic resin, for instance, 100 parts low density polyethylene resin, and executing the injection molding at a molding temperature of 120°C. The antibacterial chopping board being a formed part obtained in such a way comes to a rectangular one consisting of length L, width W and thickness (d), or a disk-like one consisting of a diameter D and thickness D. Thiabendazole is white powder and has an odorless quality, and also, has a wide antibacterial spectrum, and as for the quantity for adding and mixing it to polyethylene or synthetic rubber, 0.01-5.0% is desirable.