Xanthoxylii Fructus(山椒) is the pericarp of Xanthoxylum piperitum D.C. according to the KP II. The pericarp of Xanthoxylum coreanum $N_{AKAI}$, which is the native plant in Che-ju island is called as Xanthoxylii Fructus in that area. In this paper, the pharmacognostical study on pericarp of Xanthoxylum coreanum $N_{AKAI}$ is investigated to distinguish its morphological from those of pericarps of Xanthoxylum piperitum D.C. and Fagara mandshurica $H_{ONDA}$.