PROBLEM TO BE SOLVED: To provide a glue supply device and a glue supply method, capable of suppressing the decomposition and corrosion of glue and enabling sufficient use of the effect of the glue.SOLUTION: The glue supply device 2 for supplying a glue solution 230 to electrolyte 10 inside an electrolyzer 11 for electrolytically refining copper includes: a dissolution tank 23 for dissolving the glue 20; a feeder 22 for supplying the glue into the dissolution tank 23; a liquid level measuring device 27 for measuring the liquid level height of the glue solution 230 stored inside the dissolution tank 23; and a controller 30 for measuring the liquid level height of the glue solution 230 in the dissolution tank 23 by the liquid level measuring device and controlling the feeder mechanism 223 and valve 250 of the feeder 22 so as to replenish the glue and water in an amount required for the glue solution 230. A small amount of the glue solution is prepared and also continuously supplied to the electrolyte 10.
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