Abstract: Provided is an electrode plate vibration structure of an oxygen/hydrogen mixture gas generator having an electrolytic bath, and a plurality of electrode plates arranged to be at a predetermined interval in the electrolytic bath and electrolyzing electrolyte using current applied to a terminal to generate oxygen/hydrogen mixture gas. The structure includes: a vibration bar provided at one side and upper end of the electrode plate and having insertion grooves for fitting the electrode plate therein, and minutely vibrating the electrode plate depending on operation of a vibration unit.