Abstract: The head cap for the use of head physical therapy in the present invention is related that the head cap is covered the head when using the vacuum device to generate a negative pressure for treating the head by massaging the user's head and improving a blood circulation. The head cap in the present invention includes a head housing with an opening and a hole, an auxiliary unit connected with the opening and having an air vent, a vacuum device connected with the air vent, and a cushion ring connected with the head housing, wherein the cushion ring and the head housing form a sealed space when a user inserts its head in the cushion ring and the vacuum device is configured to provide the negative pressure for the physical therapy.