Multi microneedle device using fluid injector operating device

If it injected intradermally at multiple microneedle device using fluid injector to provide an inexpensive operating device easily and reliably in a short time a desired quantity fluid simplify the possible injection into skin tissue structure. The instrument (14): the injector in the housing space of the outer cylinder (16) (16c) (12), the device (10) of the needle (10c) is first from one end opening (16a) of the space distance first protruding position obtained by externally protruded to a second position which is external projecting to shorter second distance greater than the first distance, selected moving mechanism for moving (18) between; equipped with, the injection with second position vessel fluid through the needle is flowing out, the mechanism is interposed between the outer tube and the injector, longitudinal of the outer cylinder correspond to the direction and amount of relative rotation of the outer cylinder relative to the injector rotation moves the injector along the direction center line between the first position and the second position - including straight movement converting mechanism (20).