To provide an injection molding machine capable of reducing an energy consumption.

An injection molding machine 10 fills molten resin into a mold 30 and molds the same. The injection molding machine 10 includes a cylinder 41 to which the resin is supplied, and heaters 91 to 94 heating the cylinder 41. The cylinder 41 is divided into a plurality of cylindrical parts 41a, 41b in an axial direction, and a heat insulation ring 71 is disposed between the cylindrical part 41b in which a resin supply port 63 is formed and the cylindrical part 41a on which the heaters 91 to 94 are provided.