An application kit according to one embodiment includes: a cartridge including a sheet member； and an applicator being connectable to the cartridge. The cartridge includes a bending portion configured to bend the sheet member and a cartridge-side connector configured to be detachably connected to the applicator. The applicator includes: an applicator body； an applicator-side connector provided to a bottom portion of the applicator body； a cap provided above the applicator body and being movable along a height direction of the applicator body； and an elastic member extending along the height direction between the applicator body and the cap and configured to apply, to the cap, an elastic force that acts in a direction away from the bottom portion.
