Abstract: A stereographic tomogram observing apparatus comprises a memory for storing tomographic picture data of a specific part of internal tissue of the object, a reading device for reading out the tomographic picture data, a projecting type CRT for projecting light beams at intensities corresponding to tomographic picture data read out by the reading device, a picture reproducing device made up of a plurality of tomographic picture reproducing screens arranged in parallel and for reproducing corresponding tomographic pictures, and a switching circuit for making the tomographic picture data read out correspond to the screen for reproducing the tomographic picture data.