By judging mold touch with good accuracy, a toggle support is stopped at a desired position with good accuracy. A toggle support (15) is moved forward in a mold closing direction and a detection value from a mold-clamping force sensor is monitored. When the detection value reaches a threshold value, the toggle support (15) is stopped. The mold-clamping force sensor is a tie-bar strain sensor (18) detecting strain of a tie-bar, a pressure sensor (40) detecting pressing force applied to a movable platen (13A), or a strain sensor (41) detecting strain of a component part of a toggle mechanism (20).