According to a dental image display device (1), a dental surgical operation device (1), and a dental image display method, a 2D captured image (P) of a tooth (T) as a surgical operation target that is captured with visible light in an articulation face direction, and an articulation face direction converted 2D image (Cs1) obtained as a result of displaying 3D information, which is acquired on the tooth (T) and includes information on a root canal (R) inside the tooth (T), two-dimensionally on a predetermined plane in the articulation face direction, are displayed in correspondence with each other on a monitor (15).
