A door basket of a refrigerator is disclosed. The door basket includes a supporting basket detachably installed to a rear surface of a door of the refrigerator, extending in the form of a rectangular hexahedral shape in the longitudinal direction, and having a seating space with an open upper side and a longitudinal open side; and a pivoting basket optionally seating in the seating space by which an opposite end of the pivoting basket is supported to pivot forward and backward the door about an end of the pivoting basket, extending in the form of a rectangular hexahedral shape in the longitudinal direction to correspond to the seating space, and having an accommodating space with an open upper side to accommodate food. It is possible to minimize restriction of height of food to be accommodated in the door basket and to easily accommodate food.