A pressure gauge is provided, which comprises a pedestal, a spring tube, a needle pivot, a needle and a indicating panel. The spring tube is connected to the needle pivot and able to drive the needle pivot to rotate. A fixing portion is provided on one end of the spring tube. The pedestal is provided with a mounting portion, and the mounting portion is provided with an open slot. The fixing portion is installed in the open slot. The pressure gauge has a simple structure and low cost.