The present specification relates to a degreasing agent for a grain-oriented electrical steel sheet and a degreasing method using the same, and in detail, a degreasing agent capable of removing rolling lubricant existing on the surface of a cold-rolled steel sheet prior to decarburization annealing and immersion annealing, and a degreasing method using the same. . According to an embodiment of the disclosed degreasing method, it includes the step of immersing a cold-rolled steel sheet in a degreasing agent, wherein the degreasing agent is at least in wt%, glycerin: 1 to 5%, hydrogen peroxide: 7 to 13%, hydrofluoric acid: less than 4% It contains at least one type, and the balance contains alcohol having 1 to 8 carbon atoms and inevitable impurities.
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