An injection molding machine in which an actual value of a control amount of a movable part can easily reach a set value in a short period of time is provided. The injection molding machine is provided with the movable part, a driving part driving the movable part and a control device controlling the driving part. The control device calculates a set value of the operation amount of the driving part according to the deviation between the actual value of the control amount of the movable part and a corresponding set value, and calculates a set value of the operation amount in current injection according to calculation results of set values of operation amounts in former injection.