PURPOSE: To obtain a usable and inexpensive bracket which facilitates installation adjustment of parts and causes no dislocation of the installation parts even when external force is applied to the bracket by forming an installation port of a plurality of ports connected in a zigzag form.

CONSTITUTION: A parts installation port 13 is formed on a surface 11, while an installation port 16 through which a screw 15 to be installed on an installation member 14 is inserted is formed on a surface 12, in a vertical direction with respect to a curved part 17. The installation port 16 is composed of plural circle holes 18 formed in line every pitch of P measurement. The circle holes 18 are also formed in an zigzag form every half pitch of P measurement spaced from the line of the circle holes 18 by R measurement. The pitch P and the space R between the holes 18 are so set that W measurement is smaller than an outer diameter of the screw even when the circle holes 18 are zigzag continued through interfere. Therefore, even when external force is applied to an L-shaped bracket 10, it is prevented from being dislocated because the force is received by the screw on an edge of the circle hole 18.