Wavelength-tunable monochromatic Parametric x-ray (PXR) was generated at the Laboratory for Electron Beam Research and Application (LEBRA) at Nihon University. Using the LEBRA-PXR, phase contrast imaging was carried out. Phase contrast images of a kitten deciduous tooth were taken by diffraction enhanced imaging (DEI) method. The results showed that LEBRA-PXR is a high coherent x-ray and is suitable for phase contrast imaging.