Provided is a patch case that can easily be attached to a microneedle applicator, enables easy separation of microneedle patches during needling, and can be used disposably. The main body of a patch case according to the present invention is characterized by having a thermoplastic polymer as a raw material and being capable of holding microneedle patches comprising a support body film that can be thermally fused with said thermoplastic polymer. It is preferable that the thermoplastic polymer of the main body and the fusible raw material of the support body film are both polyolefins or both the same thermoplastic polymer. Since the applicator does not make contact with the skin of a person receiving administration if the patch case is attached to the front surface of the applicator, hygiene can be maintained even if the applicator is used continuously.
