Problem to be solved: to provide an attachment structure to the apparatus body of a filling cylinder unit capable of mounting the filling cylinder unit with high accuracy to the apparatus body without having to be distributed to each worker.First and second rod side engaging portions 32 and 34 are provided at the front end of the rod 2604 of the first and second actuators 26a and 26b, respectively.The base plate 24 is provided with first and second base plate side engaging portions 40 and 42.By the operation of the first actuator 26a, the first rod side engaging portion 32 is engaged with the first base plate side engaging portion 40, and the base plate 24 is positioned in the X and Y directions with respect to the mounting plate 16.The second rod 26b engages with the second rod side engaging portion 34 and the second base plate side engaging portion 42. The base plate 24 is positioned in the Y direction with respect to the mounting plate 18 while allowing the movement of the base plate 24 in the X direction.Diagram
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