To realize an aseismatic support structure of an electronic device used in installing the electronic device on a floor of double floor structure, adjustable in height and moreover small, lightweight and low in cost.

The aseismatic support structure of the electronic device is composed of an aseismatic fitting 12 opened in isosceles trapezoidal shape with the lower ends of leg parts 13, 14 fixed to a floor face 1 and with a through hole bored in a horizontal top part 15 connecting the upper ends of the leg parts 13, 14; a support bolt 20 loosely fitted into the through hole of the aseismatic fitting, with the upper end screwed into a pedestal 10a of the electronic device 10; and a locknut 22 screwed with the support bolt 20 to hold the horizontal top part 15 of the aseismatic fitting 12.