Stacker crane

A stacker crane comprising:

• a travel unit that moves along a shelf that stores a load;
• a transfer unit that transfers the load to the shelf;
• a mast extending vertically and attached to the travel unit;
• an ascending and descending unit that slides along the mast and moves the transfer unit vertically;
• a first covering body covering a sliding section of the mast and the ascending and descending unit, and providing a first space extending vertically along the mast;
• a second covering body providing a second space extending vertically along the mast, the second space being partitioned from the first space by a first barrier;
• a plurality of exhaust holes that are vertically dispersed in the first barrier and cause the first space and the second space to be in communication;
• an exhaust device that is attached to the mast and expels air in the second space;
• and
• a second barrier that extends vertically and provides a third space and a fourth space by horizontally partitioning the first space;
• wherein
• the exhaust device includes an intake port located closer to the third space than the fourth space;
• the plurality of exhaust holes include a plurality of first exhaust holes that cause the third space and the second space to be in communication, and a plurality of second exhaust holes that cause the fourth space and the second space to be in communication;
• and
• an airflow resistance of the plurality of first exhaust holes is higher than an airflow resistance of the plurality of second exhaust holes.