The present invention relates to a method for producing biodiesel from waste coffee beans without using a catalyst. More particularly, the present invention relates to extracting lipids from waste coffee beans by forming an acidic environment using thermal hydrolysis of an organic chloride solvent. (Extraction step), and a method for producing biodiesel by transesterification with a alcohol (conversion step). According to the present invention, it is possible to reduce the subsequent process by not using the catalyst, and since it is possible to use the wet waste coffee beans without pre-drying process after discharging the coffee, the process cost and production required for energy consumption and equipment Lower unit prices can contribute to economic biodiesel supply and demand. In addition, by recycling waste coffee beans to produce biodiesel, it is possible to prevent environmental pollution that may be caused by landfilling of waste coffee beans.
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