¹²⁹Xe chemical shift tensor is very sensitive to the site symmetry and the shape of pores, channels, voids, and cages which can accommodate xenon atoms.  Xenon atom confined in micro-voids and/or cages broadens ¹²⁹Xe NMR spectra due to chemical shift anisotropy (CSA).  ¹²⁹Xe chemical shift tensor and its anisotropy provide us useful information about not only the shape of the micropore but also the host-guest interactions.  In this article, we review some recent papers, in which the shape of the micropore is discussed on the basis of ¹²⁹Xe chemical shift tensor, and show usefulness and advantage of ¹²⁹Xe chemical shift tensor as a probe to examine the physico-properties of micropores.