PURPOSE: To make an injection unit turn sufficiently even with a cylinder of stroke at the time of nozzle touching by providing two connecting holes for nozzle touching and turning at a joint which connects a nozzle touch cylinder and the injection unit.

CONSTITUTION: Turning center holes 17 and 18 of a sliding stage and an injection unit 6 are made to coincide with each other so as to insert a turning pin 19 into them and a guide block is removed. A connecting pin which connects the injection unit 6 to a nozzle touching connecting hole of a joint 30 at a tip of a piston rod 20a is pulled out. The piston rod 20a is moved to a nozzle touch position by a stroke L and stopped at a position where a connecting hole for turning of the joint 30 and a connecting hole of the injection unit 6 coincide with each other so as to insert the connecting pin which is pulled out previously. When a nozzle touch cylinder 20 is operated, the joint 30 moves by a stroke L+S and the injection unit 6 turns with supporting point at the turning pin 19 as shown by a chained line 6a. Returning of the turning is performed in a reversed process.