[Aim] We examined the types, distribution, and structural characteristics of antennal sensilla in male and female Menochilus sexmaculata Fabricius. [Method] The antennal sensilla and its structural characteristics in male and female adults of M. sexmaculata were examined using scanning electron microscopy. [Result] The antennae consist of a scape, pedicel, and flagellum. The scape is longer and wider than the pedicel. The flagellum is divided into 9 segments, and the terminal 3 segments have an enlarged in hammer shape. Eight types of sensilla were detected on the antennae of female and male adults: sensilla chaotic, sensilla trichodea, sensilla basiconca, cavity-like sensilla, campaniform sensillum, dumbbell sensilla, sausage sensilla, B?hm bristle. The sensilla trichodea and sensilla chaetica showed the widest distribution throughout the antennae. B?hm bristle was found only in the scape and pedicel of the antennae. The tip of 9th flagellomeres (F9) was covered with 7 antennal sensilla. There were no significant differences in antennal length, type, or distribution of antennal sensilla between male and female adults. [Conclusion] The 8 types of antennal sensilla in M. sexmaculata may function as mechanoreceptors, chemoreceptors, thermoreceptors, and hygroreceptors. This research provides basic data for further analysis of the relationship between antennae and their morphology.