A side view endoscope capable of changing the side view perspectives includes a tube, a rotator, a reflective element, a side view camera module and a side view light source. The tube has a circular window. The rotator is disposed in the tube. The reflective element is in the tube and driven by the rotator to rotate. The reflective element has a reflective surface rotating with respect to the window so that the peripheral image of the tube side can be received at the reflective surface through the window. The side view camera module is coaxially disposed in the tube to capture the reflected image from the reflective surface. The side view light source is placed in the tube to generate light to irradiate the surrounding of the tube.
