Syzygium odoratum (Lour.) DC. 1828 is a deciduous shrub in the family Myrtaceae. This species grows in sparse forests, especially in mountains, valleys, and broad-leaved evergreen forests along streams from 100 to 400 m above sea level. The primary distribution is in southern China (e.g. Guangdong, Guangxi, Hainan, etc.) and other south Asian countries (e.g. Vietnam). Here, we report and characterize the complete plastome from a cultivar of S. odoratum (Lour.) DC. 1828. The complete plastome is 159,352 bp in length with a typical structure and gene content found in angiosperms, including two inverted repeat regions (IRs) of 26,472 bp, a large single-copy (LSC) region of 87,993 bp, and a small single-copy (SSC) region of 18,415 bp. The plastome contains 132 genes, consisting of 84 protein-coding genes, 37 tRNA genes, and eight rRNA genes. The overall G/C content in the plastome of S. odoratum is 36.9%. By inferring phylogenetic relationships based on the existing data of related taxa, we find that S. odoratum is most closely related to Syzygium acuminatissimum, (Blume) DC. 1828 given the current sampling. The complete plastome sequence of S. odoratum will provide a useful resource for conservation genetics of this species, as well as for phylogenetic studies involving Myrtaceae.