Disclosed is a vibration converting chair to be able to most effectively transmit the vibration energy of a transducer by molding a spring material in all-in-one form within a foam sponge which is a material of a cushion or a back piece of a chair and by implementing a new type of vibration transmission method to fix a transducer, which converts acoustic signals into vibrations, on the spring material within the foam sponge in a free condition, and therefore, for a sitter to be able to experience more detailed three-dimensional vibrations, and on the other hand, to be enable to enhance the durability of the foam sponge with the pressure dispersed by combining the spring and the mesh materials molded within the foam sponge in all-in-one form, and eventually to be able to improve the effects of experiencing the vibrations by maximally spreading the vibrations.