A microneedle unit includes: a microneedle which includes a first surface having at least one projection and a second surface located opposite the first surface, and has flexibility； and a support section that is bonded to the second surface of the microneedle to supports the microneedle. The support section includes: an adhesive section which extends outside from the second surface, and has adhesiveness to adhere to a skin； and a rigid section which includes a rigid plate having a rigidity higher than the rigidity of the adhesive section and higher than the rigidity of the microneedle.
