The complete mitochondrial genome of a Chinese stag beetle, Prismognathus prossi, was generated using the Illumina next-generation sequencing. The mitogenome sequence is 15,984 bp in length, the nucleotide composition isA 36.6%, C17.5%, T34.3% andG11.6%with theAT-content of 70.9%. The sequence has similar features with other reported insectmitogenomes, consisting of 13 proteincoding genes (PCGs), 22 transferRNAgenes, tworibosomalRNAsand a control region. All of the protein-coding genes start with the typicalATNinitiation codon except for COI. Maximum Likelihood (ML) and Bayesian Inference (BI) indicated that P. prossi share an affinity with Lucanus mazama, Lucanus fortunei and Cyclommatus vitalisi.