Soft X-ray holograms within water-windows are recorded in photoresist and reconstructed by using numerical technology. The 3.20 nm soft X-ray used in the experiments are a bending magnet radiation from a 800 MeV electron storage ring and have been monochromatized by a linear monochromator. The estimated resolution of the reconstructed images is better than 2 μm and remains to be improved in the future.