Gelechia rhombella, the apple groundling, is a moth of the Gelechiidae family. It is widely distributed in Europe. Outside of Europe, it is found in the Caucasus, Transcaucasia, southern Siberia, the Russian Far East, Korea and China (Gansu, Qinghai, Jilin). The wingspan is 13–17 mm. Adults are on wing from July to August. The larvae feed on Malus species (including Malus domestica) and Pyrus communis. They feed from within a folded leaf or between spun leaves.