To provide an earthquake-resistant supporting device for a turbine frame capable of reducing earthquake load of the turbine frame without remarkably changing the structure of the turbine frame.

A plate spring 5 and connecting lugs 6 at both ends are connected to a bracket 8 by supporting pins 7 with the center parts having spherical shapes. A steel plate 4 is arranged so that one end of a turbine frame supporting device 3 constituted of an anchor bolt 9 and the other end may be fixed to the steel plate 4 at an upper end of the turbine frame 1 and an internal surface of an upper part of a turbine building floor 2, respectively.