BACKGROUND

1. Technical Field

The present disclosure relates to a storage box, particularly to a storage box suitable for management of a storage object at a desired temperature.

2. Description of the Related Art

Conventionally, a heat insulation container is used to manage a storage object in a desired temperature range. For example, a heat insulator such as a vacuum heat insulating material is used as the heat insulation container, and the storage object can be kept in the desired temperature range (for example, see Unexamined Japanese Patent Publication No. 2013-10523).

When the storage object is an investigational drug, it is necessary to keep the investigational drug in the temperature range of, for example, 2° C. to 8° C. However, when the storage object is out of the temperature range at a certain place even if the storage object is within the temperature range at another place in the storage box, the storage object is made disposal. Thus, it is important to prevent a temperature distribution in the storage box as much as possible.

As to the temperature distribution in the storage box, generally a large temperature difference is generated between the temperatures of a top surface portion and a bottom portion of the storage box, and the temperature of the top surface portion is higher than the temperature of the bottom portion.

SUMMARY

The present disclosure provides a storage box that can more homogeneously keep the temperature inside a storage box by preventing a temperature difference.

A storage box of the present disclosure includes a wall including: a packaging member; and a heat transfer body and a cold storage agent that are stored in the packaging member. The cold storage agent is disposed closer to an outer surface of the storage box than the heat transfer body is.

