A guide assembly for use in a door of a refrigerator comprises: a sliding rail; a movable member located above the sliding rail; and a connection member connected and fixed to the door. The sliding rail comprises a slide and a track both extending in the left and right direction. The movable member can move along the slide in a reciprocating motion in the left and right direction. The movable member also has a sliding groove extending in the frontward and rearward direction. The connection member comprises a first roller disposed at the sliding groove and capable of moving along the sliding groove in the frontward and rearward direction. The guide assembly further comprises a guide structure disposed under the connection member. The guide structure is movably disposed in the track to guide the movement of the door.