A refrigerator comprising: a cabinet that defines a storage space; a door that is mounted to the cabinet and that is configured to open and close the storage space; a mounting part that is located on an inner surface of the door; and baskets (200, 210, 220, 230) that are each detachably mounted to the mounting part and that each comprise: a basket body (211, 221, 231) that defines an accommodation space that is configured to receive food and that includes a recessed part (212, 222, 232) on a bottom surface of the basket body (211, 221, 231); and a frame (300, 400, 500) that is located in the recessed part, that is configured to support the basket body (211, 221, 231), and that is detachably mounted to the mounting part, wherein the door comprises: a main door that is configured to open and close the cabinet by rotating and that defines an opening to the storage space, a sub-door that is rotatably mounted to the main door and that is configured to open and close the opening to the storage space, and the mounting part includes first mounting parts that protrude toward the opening, each frame is a fixing frame that includes fixing mounting parts that are at locations that correspond to the first mounting parts and that are configured to receive the first mounting parts, and wherein each fixing mounting part is recessed in a lower surface of the fixing frame towards a top of the corresponding basket and is configured to receive a corresponding first mounting part, and further comprising fixing members that are each rotatably mounted, at an end of the corresponding fixing member, to the lower surface of the fixing frame. a cabinet that defines a storage space; a door that is mounted to the cabinet and that is configured to open and close the storage space; a mounting part that is located on an inner surface of the door; and baskets (200, 210, 220, 230) that are each detachably mounted to the mounting part and that each comprise: a basket body (211, 221, 231) that defines an accommodation space that is configured to receive food and that includes a recessed part (212, 222, 232) on a bottom surface of the basket body (211, 221, 231); and a frame (300, 400, 500) that is located in the recessed part, that is configured to support the basket body (211, 221, 231), and that is detachably mounted to the mounting part, a basket body (211, 221, 231) that defines an accommodation space that is configured to receive food and that includes a recessed part (212, 222, 232) on a bottom surface of the basket body (211, 221, 231); and a frame (300, 400, 500) that is located in the recessed part, that is configured to support the basket body (211, 221, 231), and that is detachably mounted to the mounting part, wherein the door comprises: a main door that is configured to open and close the cabinet by rotating and that defines an opening to the storage space, a sub-door that is rotatably mounted to the main door and that is configured to open and close the opening to the storage space, and the mounting part includes first mounting parts that protrude toward the opening, each frame is a fixing frame that includes fixing mounting parts that are at locations that correspond to the first mounting parts and that are configured to receive the first mounting parts, and wherein each fixing mounting part is recessed in a lower surface of the fixing frame towards a top of the corresponding basket and is configured to receive a corresponding first mounting part, and further comprising fixing members that are each rotatably mounted, at an end of the corresponding fixing member, to the lower surface of the fixing frame. a main door that is configured to open and close the cabinet by rotating and that defines an opening to the storage space, a sub-door that is rotatably mounted to the main door and that is configured to open and close the opening to the storage space, and the mounting part includes first mounting parts that protrude toward the opening, each frame is a fixing frame that includes fixing mounting parts that are at locations that correspond to the first mounting parts and that are configured to receive the first mounting parts, and wherein each fixing mounting part is recessed in a lower surface of the fixing frame towards a top of the corresponding basket and is configured to receive a corresponding first mounting part, and further comprising fixing members that are each rotatably mounted, at an end of the corresponding fixing member, to the lower surface of the fixing frame.