The microneedle container (20) includes a housing part (22) and a lid part (21). The microneedle (30) includes a base body (31). The base body (31) includes a protrusion forming surface (31a) having a protrusion (32) and a supported surface (31b) opposite to the protrusion forming surface (31a). ). In the projection forming surface (31a), the portion where the projection (32) is not located is the contacted portion (31a1). The accommodating portion (22) includes a support portion (22a) that supports the supported surface (31b). The lid portion (21) includes a contact portion (21a) facing the contacted portion (31a1) and a facing portion (21b) facing the protruding portion (32), and faces the contact portion (21a). The distance between the portion (21b) is larger than the distance between the contacted portion (31a1) and the tip of the protrusion (32) in the extending direction, which is the direction in which the protrusion (32) extends. Further, the distance between the contact portion (21a) and the support portion (22a) is the distance between the contacted portion (31a1) and the supported surface (31b) in the extending direction, and the contacted portion. It is smaller than the sum of the distance between (31a1) and the tip of the protrusion (32).マイクロニードル用容器（２０）は、収容部（２２）と蓋部（２１）とを備える。マイクロニードル（３０）は基体（３１）を備え、基体（３１）は、突起部（３２）を有する突起形成面（３１ａ）と、突起形成面（３１ａ）とは反対側の被支持面（３１ｂ）とを有する。突起形成面（３１ａ）において突起部（３２）の位置しない部分が被当接部（３１ａ１）である。収容部（２２）は、被支持面（３１ｂ）を支持する支持部（２２ａ）を備える。蓋部（２１）は、被当接部（３１ａ１）と対向する当接部（２１ａ）と、突起部（３２）と対向する対向部（２１ｂ）とを備え、当接部（２１ａ）と対向部（２１ｂ）との間の距離が、突起部（３２）の延びる方向である延設方向において、被当接部（３１ａ１）と突起部（３２）の先端との間の距離よりも大きい。また、当接部（２１ａ）と支持部（２２ａ）との間の距離が、延設方向における被当接部（３１ａ１）と被支持面（３１ｂ）との間の距離と、被当接部（３１ａ１）と突起部（３２）の先端との距離との和よりも小さい。
