To provide much better freedom of use by equipping with a pair of left and right supports which support a hood in an illuminator, free to rotate front and back against left and right boards of a shelf body, structuring the supports elastically and making the height and direction alterable in the installation of the illuminator.

In the lower shelf body, a pair of left and right supports which support a hood of an illuminator, is equipped free to rotate front and back against left and right boards 9a, 9b and each support is structured elastically. The hood is equipped having a shakable neck against each support. Further, it is structured as follows: A rotation control member is penetrated through cases 54a, 54b which divide in two a tightening screw 53 protruding horizontally from a bracket 56 fixed on the inner surface of the right and left boards 9a, 9b and inserted inside both cases 54a, 54b into both ends of a spring plate 55 wound on a bas 47c of the rotation support. The rotation control member pushes both cases 54a, 54b from outside of one case 54a by a tightening handle 57 toward the bracket 56 direction.