PROBLEM TO BE SOLVED: To provide a method for certainly and easily inserting into the skin microneedles made of a biodegradable resin which is weak in a shock and has a tendency to easily break without generating the breakage, and to provide an assistance implement for the same.SOLUTION: As a first mode, an assistance implement for inserting microneedles into a skin includes: a plate 2 having one face that is a fixed face of the microneedles 1, and erected with a piston 3 on the other face； and a cylindrical member 4 wherein the plate is loosely fitted and is held, and wherein an end face on one side in the axial direction thereof is brought into pressure-contact with the skin surface. As a second mode, an assistance implement for inserting the microneedles into the skin includes: a plate having the one face that is the fixed face of the microneedles； and a frame body comprising a plate member formed with a bend part bendable in a perpendicular direction to the one face of the plate.
