Buffer material for packing wafer carrier

A buffer material for packing a wafer carrier, the buffer material comprising an upper buffer body and a lower buffer body that are arranged above and below a wafer carrier at the time of packing the wafer carrier in a container, the wafer carrier comprising:

• a box-like carrier main body that has an access opening formed in an upper surface thereof and a frame-like step portion formed on an upper inner peripheral surface of the access opening, and stores wafers therein;
• and a lid body that closes the access opening in an openable manner when it is accommodated in the frame-like step portion through a gasket,
• wherein the upper buffer body comprises:
• an upper concave portion that is formed on a lower surface thereof and accommodates an upper portion of the wafer carrier;
• and a pressing rib that is brought into contact with an upper end surface of the carrier main body and pressed against the upper end surface of the carrier main body without contacting the lid body, and
• the lower buffer body comprises:
• a lower concave portion that is formed on an upper surface thereof and accommodates a lower portion of the carrier main body;
• and a support portion that is brought into contact with the lower portion of the carrier main body and supports the lower portion of the carrier main body in the lower concave portion.