A refrigerator, comprising: a main body having a storage chamber; a first door rotatably connected to a front surface of the main body, configured to open or close the storage chamber, and having an opening in which at least one door shelf assembly (100,200) is disposed; and a second door rotatably connected to a front surface of the first door, and configured to open or close the opening, wherein the door shelf assembly (100, 200) includes: a door shelf (110, 210) configured to store food therein, a guide (120, 220) removably fixed on side walls of the opening, characterised by a moving unit (130,230) removably coupled with side walls of the door shelf (110,210) and moving with it in an up-down direction, guided by the guide (120, 220) to move in an up-down direction, and including a catching portion (135, 235) having catching projections (137, 237) arranged in the up-down direction, a stopper (140, 240) coupled with the guide (120, 220), and caught by or released from the catching projections (137, 237) to adjust a position of the moving unit (130,230), the guide (120, 220) including a stopper coupling portion (123, 223) with which the stopper (140, 240) is rotatably coupled, the stopper (140, 240) including a coupling hole (141, 241) rotatably coupled with the stopper coupling portion (123, 223), a latch (150,250) configured to fix the stopper (140, 240) released from the catching projections (137, 237) by preventing said stopper (140, 240) to rotate toward the catching projections (137, 237) if the moving unit (130,230) moves up to a top of the guide (120, 220), the moving unit (130,230) including a rotation guide portion (139, 239) disposed below the catching projections (137, 237) and configured to guide the stopper (140, 240) to rotate on the coupling hole (141, 241) in the opposite direction of the direction toward the catching projections (137, 237) when the moving unit (130, 230) moves up to a top of the guide (120, 220). a main body having a storage chamber; a first door rotatably connected to a front surface of the main body, configured to open or close the storage chamber, and having an opening in which at least one door shelf assembly (100,200) is disposed; and a second door rotatably connected to a front surface of the first door, and configured to open or close the opening, wherein the door shelf assembly (100, 200) includes: a door shelf (110, 210) configured to store food therein, a guide (120, 220) removably fixed on side walls of the opening, characterised by a moving unit (130,230) removably coupled with side walls of the door shelf (110,210) and moving with it in an up-down direction, guided by the guide (120, 220) to move in an up-down direction, and including a catching portion (135, 235) having catching projections (137, 237) arranged in the up-down direction, a stopper (140, 240) coupled with the guide (120, 220), and caught by or released from the catching projections (137, 237) to adjust a position of the moving unit (130,230), the guide (120, 220) including a stopper coupling portion (123, 223) with which the stopper (140, 240) is rotatably coupled, the stopper (140, 240) including a coupling hole (141, 241) rotatably coupled with the stopper coupling portion (123, 223), a latch (150,250) configured to fix the stopper (140, 240) released from the catching projections (137, 237) by preventing said stopper (140, 240) to rotate toward the catching projections (137, 237) if the moving unit (130,230) moves up to a top of the guide (120, 220), the moving unit (130,230) including a rotation guide portion (139, 239) disposed below the catching projections (137, 237) and configured to guide the stopper (140, 240) to rotate on the coupling hole (141, 241) in the opposite direction of the direction toward the catching projections (137, 237) when the moving unit (130, 230) moves up to a top of the guide (120, 220). a door shelf (110, 210) configured to store food therein, a guide (120, 220) removably fixed on side walls of the opening, characterised by a moving unit (130,230) removably coupled with side walls of the door shelf (110,210) and moving with it in an up-down direction, guided by the guide (120, 220) to move in an up-down direction, and including a catching portion (135, 235) having catching projections (137, 237) arranged in the up-down direction, a stopper (140, 240) coupled with the guide (120, 220), and caught by or released from the catching projections (137, 237) to adjust a position of the moving unit (130,230), the guide (120, 220) including a stopper coupling portion (123, 223) with which the stopper (140, 240) is rotatably coupled, the stopper (140, 240) including a coupling hole (141, 241) rotatably coupled with the stopper coupling portion (123, 223), a latch (150,250) configured to fix the stopper (140, 240) released from the catching projections (137, 237) by preventing said stopper (140, 240) to rotate toward the catching projections (137, 237) if the moving unit (130,230) moves up to a top of the guide (120, 220), the moving unit (130,230) including a rotation guide portion (139, 239) disposed below the catching projections (137, 237) and configured to guide the stopper (140, 240) to rotate on the coupling hole (141, 241) in the opposite direction of the direction toward the catching projections (137, 237) when the moving unit (130, 230) moves up to a top of the guide (120, 220).