A card case includes a flexible member and a card box. The flexible member is provided with a first holding groove and a first opening, and the first opening is in communication with the first holding groove, and a direction faced by the first opening is a first direction; a card box is connected to the flexible member, the card box is provided with a second holding groove and a second opening, and the second holding groove is configured to hold cards or banknotes; the second opening is in communication with the second holding groove, and a direction faced by the second opening is a second direction, and the second direction is parallel to the first direction, or an angle is formed between the second direction and the first direction, and the angle is from 0° to 355°.