An intravenous artificial pancreas is disclosed. The intravenous artificial pancreas of the present invention is an artificial pancreas that injects insulin into the blood vessels of a diabetic patient. The artificial pancreas includes an insulin injector inserted subcutaneously in a diabetic patient; And an insulin infusion tube, one end of which is connected to the insulin injector and the other end is inserted into the vein so that the insulin is directly supplied to the vein. According to the present invention, when the blood sugar level of the vein increases more than the reference value, the blood sugar level of the vein can be precisely controlled without delay time between the time point of increasing the blood sugar level of the vein and the time of injecting the insulin into the vein, It is possible to provide an intravenous artificial pancreas in which the body is allowed to perform unrestricted activities in contact with water.
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