invention will be described with reference to fig3 the nozzle touch mechanism shown in fig3 differs from the nozzle touch mechanism of embodiment 1 fig2 in that a connecting rod adjusting member 23 is provided between a connecting rod 21 and a detachably attaching plate 22 while an injection cylinder 1 and a nozzle 2 vary in length the connecting rod adjusting member 23 serves to adjust the length of the connecting rod 21 so that the tip of the nozzle 2 can appropriately contact a stationary platen 33 of a mold fig8 and 9 are enlarged views showing the connecting rod adjusting member 23 in the nozzle touch mechanism of fig3 and its surroundings in the example of fig8 the connecting rod 21 detachably attaching plate 22 and connecting rod adjusting member 23 are penetrated individually by holes and a thread groove is formed on the inner surface of the hole in the connecting rod 21 a screw 24 having its proximal end portion secured to the detachably attaching plate 22 penetrates the hole in the connecting rod 21 and an external thread formed on the tip end of the screw 24 is threadedly engaged with the thread groove of the hole in the rod 21 thus the length of a combination of the connecting rod 21 detachably attaching plate 22 and connecting rod adjusting member 23 can be adjusted by rotating the detachably attaching plate 22 relative to the connecting rod 21 and the connecting rod adjusting member 23 in the example of fig9 the distal end of the connecting rod adjusting member 23 is shaped so that it can be fitted into the connecting rod 21 in such a manner that an external thread formed thereon.