This type of prefilled syringe has been increasingly adopted in recent years as it does not require transfer of the drug from a container such as vial to a syringe, which is more convenient and safer for medical practitioners. This prefilled syringe is generally packaged in a carton after it is set in a plastic tray or a paper inner tray. A paper inner tray has an advantage over a plastic one as it does not have to be separated from the carton in disposal.The inner tray is flat before assembling, so it does not take up space for storage at pharmaceutical companies.The configuration of this inner tray is simplified and has high shock-absorbing effect. It is easy to assemble and will make packaging process efficient.