PURPOSE: To freely extend/contract entire length without being constrained by a corner support and to correspond to the number of columns of a bottom curtain rail by forming the internal width of the U-shape cross-section of a side plate wider than the head of the locking screw of the corner support fixed on a main body.

CONSTITUTION: The main body 11 of a bracket 10 is formed in such a way that a horizontal plate part 14 is extended horizontally from a vertical fixing plate part 13 fixed on a wall surface. etc. The cross-section of the horizontal plate part 14 is formed in reverse U-shape, and the cross-section of a slide plate 12 extending along the lower surface of the horizontal plate part 14 is formed in U-shape. The head of the locking screw 29 of the corner support 20 is located at the inside of the horizontal plate part 14, however, the internal width of the U-shape cross-section of the slide plate 12 is formed wider than the head of the locking screw 29, therefore, the sliding in the longitudinal direction of the slide plate 12 is prevented from being disturbed by the locking screw 29.