a shelf connector includes a sliding sleeve and a locking sleeve . the sliding sleeve is formed with a locking body thereon . the locking body is provided with an open groove along the axial direction of the sliding sleeve . the locking body is provided on both sides of the open groove with clasping portions . the locking sleeve is provided with a locking groove thereon . after the clasping portion is inserted into the locking groove , the width of the open groove can be reduced . with the above arrangement , in assembling , the sliding sleeve can be conveniently positioned to any suitable position of the supporting rod and locked thereto with the insertion of the locking sleeve . since the locking sleeve itself has mounting portions for mating with the frame body of the shelf , or the locking sleeve itself is the end portion of the frame body of the shelf , the connection of the whole shelf becomes very simple . by using various connectors having different specifications and purposes , it is suitable for connecting various kinds of shelf .