PROBLEM TO BE SOLVED: To provide a prefilled syringe effective for preventing incorrect administration by reliably prompting to remind of a check of a drug in the prefilled syringe filled with the drug.SOLUTION: A prefilled syringe 1 comprises an outer tube 2, a gasket 9, a sealing part 3 for sealing the tip end of the outer tube 2, and a drug filling the syringe. The outer tube 2 includes a display label 4 stuck to the outer surface of an outer tube body part 21. The display label 4 includes a label body 40 stuck to the outer tube 2 and a developable portion 4a that develops by being peeled off from the label body 40 and is configured non-removably from the label body 40. A label inner surface 42 exposed by the development of the developable portion 4a has a writable portion 42a on which anything can be written with a writing implement.
