Puncture assisting device and puncture device set

A method of administering a drug to an individual, the method comprising:

• providing a puncture assisting device comprising:
• a plurality of pinching portions that face each other, and that are attached to each other so as to be openable and closeable;
• a rod insertion portion that is disposed between the plurality of pinching portions;
• a biasing portion that biases the plurality of pinching portions to be in a closed position;
• a pair of gripping portions configured to operate the plurality of pinching portions to be in an open position;
• providing a syringe comprising a needle, an outer cylinder body accommodating a drug, and a plunger that includes a rod portion;
• gripping the gripping portions so as to operate the plurality of pinching portions to be the open position,
• pinching skin of an elbow joint stretching portion of the individual with the pinching portions of the puncture assisting device;
• puncturing said skin with the needle of the syringe;
• and
• pushing the plunger of the syringe and thereby injecting the drug into the individual, wherein, when the plunger is pushed, the rod portion of the syringe is inserted into the rod insertion portion of the puncture assisting device, thereby widening a gap between the plurality of pinching portions.