Provide is a storage apparatus for a companion animal, including a first storage part in which a companion animal is seated, a second storage part connected to an edge of the first storage part and configured to surround the companion animal, and a third storage part coupled to the second storage part, wherein the third storage part surrounds the first storage part or is turned over to cover an upper side of the second storage part, thereby allowing the companion animal to be stored in the storage apparatus having a house or bag form.