A refrigerator is provided including a main body having a storage chamber, a door coupled with the front surface of the main body, to open or close the storage chamber, and a case having a rear surface facing the rear surface of the door the front part of the case having an opening. A door guide is in the case. A sliding apparatus enables the door guide to slide to be inserted into or pulled out of the case through the opening and includes a guide rail at a bottom of the door guide, an inclined guide portion in the case to guide the guide rail, a fixing rib at the rear end of the guide portion including a streamlined shape at the front end of the fixing rib and a supporting rib in the door guide supported by the fixing rib to prevent the door guide from moving.