The purpose of the present invention is to provide a kind of puncture auxiliary and puncture outfits, are conducive to carry out the skin extensor side elbow joint from subcutaneous injection group. Puncture of the invention assists (2) comprising: a pair of plate-shaped clamping part (13,14), these can be opened and closed to combine opposite to each other Offset portion (15) bias this to clamping ring component (13,14), in the direction of closing clamping part relative to one another A pair of of tennis grip part (16,17) manipulates a pair of of clamping part (13,14), opening direction clamping part (13,14) away from each other And a stick insertion portion (23) provides one kind in the clamping ring component (13,14) and that a pair of of clamping part (13 14) insertion into the volume expansions (4) between a bar part. In addition, puncture outfit group (1) includes puncturing auxiliary (2) and syringe (3), wherein the bar part (4) provides plunger (5).