[Object] To provide a cable installed state analyzing method and an installed state analyzing apparatus of automatically analyzing an installed state of a cable such as an optical fiber. [Solving Means] An image of an installed state of an optical fiber 20 is captured by a camera 51. The optical fiber 20 is provided with position marks 23 at fixed intervals, the position marks 23 each indicating a distance from a predetermined position and a direction of the optical fiber 20. An installed state analyzing apparatus 52 performs image processing on the captured image and analyzes the installed state of the optical fiber 20 by using the optical fiber installation tools 40 and the position marks 23. Then, installed state analyzing apparatus 52 maps the installed state of the optical fiber 20 to orthogonal coordinates to thereby make it possible to calculate the coordinates of a certain position on the optical fiber 20 by using a distance from, for example, an inlet portion of the cassette 10.