﻿AbstractAeschrocoristuberculatusandA.ceylonicus(Hemiptera,Pentatomidae,Pentatominae) are mainly distributed in southern China, India, Myanmar, and Sri Lanka. Both species are also common agricultural pests. However, only the morphology of the genusAeschrocorishas previously been studied, and molecular data have been lacking. In this study, the whole mitochondrial genomes ofA.tuberculatusandA.ceylonicusare and annotated. The lengths of the complete mitochondrial genomes of the two species are 16,134 bp and 16,142 bp, respectively, and both contain 37 typical genes, including 13 protein-coding genes (PCGs), two ribosomal RNA genes (rRNAs), 22 transfer RNA genes (tRNAs), and a control region. The mitochondrial genome structure, gene order, nucleotide composition, and codon usage ofA.tuberculatusandA.ceylonicusare consistent with those of typicalPentatomidae. MostPCGsof both species use ATN as the start codon, exceptatp8,nad1, andcox1, which use TTG as the start codon.cox1,cox2, andatp6use a single T, andnad1use TAG as the stop codon; the remainingPCGshave TAA as the stop codon. The A+T contents of the two species are 73.86% and 74.08%, respectively. AlltRNAshave a typical cloverleaf structure, with the exception oftrnS1, which lacks a dihydrouridine arm. The phylogenetic tree is reconstructed using the maximum-likelihood method based on the newly obtained mitochondrial genome sequences and 87 existing mitochondrial genomes ofPentatomoideafrom the NCBI database and two species ofLygaeoideaas outgroups. The phylogenetic trees strongly support the following relationships: (Urostylididae+ ((Acanthosomatidae+ ((Cydnidae+ (Dinidoridae+Tessaratomidae)) + (Scutelleridae+Plataspidae))) +Pentatomidae). This study enriches the mitochondrial genome database ofPentatomoideaand provides a reference for further phylogenetic studies.