【Aim】 To investigate the type, number, and distribution of chemical sensilla on the antennae and mouthparts of the larvae of Tomicus minor (Coleoptera: Curculionidae: Scolytinae). 【Method】 Chemical sensilla on the larval head of the last instar T. minor was examined using scanning electron microscopy. 【Result】 The larval antennae of T. minor have only one segment that bears six types of sensilla, including sensilla basiconica 1-2 and sensilla twig basiconica 1-4. Both the maxillary and labial palps consist of two segments with five sensory organ types. These were identified as sensilla basiconica 3, sensilla digiformia, and sensilla twig basiconica 2, 4, and 5. Sensilla basiconica 1-3 with multiple surface pores may play a typical role in odor sensing of chemicals in the larval gallery. Sensilla twig basiconica with tip pores should be interpreted as having a gustatory function. Sensilla digitiformia with a smooth and nonporous surface were presumed to be sensible to sound production in Scolytinae because only one sensilla digiformia was found on the lateral view of the maxillary palp. 【Conclusion】 Chemical sensilla on the larval head of the last instar of T. minor exhibited a low abundance, a simple distribution pattern, and an unchanged concentration on the tips of the antennae, maxillary, and labial palp. The findings of this study are expected to provide further scientific data for a deeper understanding of the feeding and related behaviors of the larvae of T. minor under bark.