Cool air supply structure of storage receptacle for refrigerator

A cool air supply structure of a storage receptacle for a refrigerator, comprising:

• a cool air duct installed to a side surface of a refrigerating chamber, the cool air duct being formed with a first channel through which cool air flows, the cool air being supplied from a cool air supply source through a cool air supply port, the cool air supply port is formed in the side surface of the refrigerating chamber;
• at least a pair of box casings divided from the refrigerating chamber, each of the box casings having a mounting space in which a storage receptacle is detachably installed and having a second channel through which the cool air supplied from the cool air duct flows to indirectly cool food accommodated in an accommodation space of the storage receptacle;
• the cool air duct having a duct main body;
• and the first channel being defined between an inner surface of the duct main body and the side surface of the refrigerating chamber, and a flange portion provided in an edge portion of the duct main body to be brought into close contact with the side surface of the refrigerating chamber;
• and a cool air control means provided in a side of the cool air duct and controlling an amount of cool air supplied to the second channel of the box casing, the cool air control means includes a control knob moving along a guide slot formed in the duct main body.