PROBLEM TO BE SOLVED: To provide a highly versatile key case capable of improving the convenience of carrying. SOLUTION: A key case 1 to which the present invention is applied is for accommodating a key 9 having a key ridge portion 91 and a head portion 92, and is attached to a plate-shaped main body portion 2 and the main body portion 2. The main body 2 is formed in a shape that can accommodate the insertion portion 3 that can rotate and move in the out-of-plane direction of the main body 2 and inserts and fixes the head 92 of the key 9 and the key ridge 91 of the key 9. The housing portion 4 is provided with a storage locking mechanism 5 for locking the rotational movement of the insertion portion 3 while the key ridge portion 91 of the key 9 is housed in the storage portion 4. [Selection diagram] Fig. 1
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