The transdermal administration device includes a flexible administration unit including a base having a first surface and a second surface opposite to the first surface, and a protrusion protruding from the first surface. And a flexible support body having a support surface for supporting the second surface. The support includes a low-rigidity part and a high-rigidity part having a higher bending rigidity than the low-rigidity part, and the low-rigidity part is sandwiched between two high-rigidity parts so as to form a belt-like pattern. The rigid portion is configured to satisfy at least one of being sandwiched between two low-rigid portions so as to form a belt-like pattern.経皮投与デバイスは、第１面と第１面とは反対側の面である第２面とを有する基体と、第１面から突き出た突起部とを備える可撓性を有した投与部を備えるとともに、第２面を支持する支持面を有する可撓性を有した支持体を備える。支持体は、低剛性部と、低剛性部よりも曲げ剛性が高い高剛性部とを含むとともに、低剛性部が帯状模様を形成するように２つの高剛性部に挟まれること、および、高剛性部が帯状模様を形成するように２つの低剛性部に挟まれること、の少なくとも一方を満たすように構成されている。
