The invention discloses a soundproof door. The soundproof door comprises a frame and door panels, a mounting groove matched with the door panels is formed in the frame, two door panels are arranged, the two door panels are rotatably connected with the frame, the opening directions of the two door panels face the outer side of the frame, the opening rotation directions of the two door panels are the same, the frame is integrally formed, and an air pipe communicated with the outside is arranged above the middle of the frame. When one door panel is closed and then the other door panel is closed,gas between the two door panels is compressed, and the gas flows to the outside through the air pipe; since both the door panels are in the closed state, the overall sound insulation effect of the soundproof door is improved.