In an injection molding machine configured to extrude a melted resin under temperature control and inject the resin into metal molds to provide a molded product, there are provided an HMI section having a built-in general-purpose operating system and configured to control a display section equipped with a touch panel, control modules, such as a main control section, a sequence processing section and a servo command section, having a dedicated microprocessor for each control element of the injection molding machine, and a driver section having servo amplifiers, hydraulic drivers, and so on, configured to be controlled by the control modules and to drive-control an actuator of the injection molding machine, in which, by variously combining together the control modules, it is possible to provide various kinds of injection-molding machines, that is, an electric operation type, a hydraulic type and a hybrid type of these combination.