A good mold opening-and-closing accuracy is maintained by causing a stationary platen (54) in a perpendicular state in a state where a nozzle touch pressure is applied to the stationary platen (54). The stationary platen (54) is inclined toward an injection apparatus (20) side in a state where the nozzle touch pressure is not applied. A drive mechanism (40) drives the injection apparatus (20) to generate the nozzle touch pressure. Information representing a relationship between the nozzle touch pressure and an inclination amount of the stationary platen (54) is stored in a memory part (71). A control part (70) controls the nozzle touch pressure generated by the drive mechanism (40) so that the inclination amount of the stationary platen (54) is within a predetermined range.