A refrigerator may include guide members (150,250,350) mounted to a storage chamber (20), with each guide member including a vertical guide hole (254,354) and a vertical guide groove (152,252,352). A shelf may (110,210,310) be mounted to the guide members, to be vertically movable, and switch members (120,220) mounted to the shelf, to be movable forwards and rearwards. Each switch member may include a body (121), and a protrusion (124,224) protruding from the body, to be guided along the guide groove (152,252,352) of the corresponding guide member. A rotating shaft (140,240,340) may be mounted beneath the shelf, to be guided along the guide holes. Pinions (142,242,342) may be provided at the rotating shaft. Rack gears (173,273,373) may be vertically mounted to the guide members, to be coupled to the pinions. A connecting device may transmit a force to vertically move a front half portion of the shelf to a rear half portion of the shelf such that the shelf is vertically movable while being maintained in a horizontal state.