Phtheochroa aarviki is a species of moth of the Tortricidae family. It is found in Kenya. The length of the forewings is 6.5–6.8 mm for males and 7 mm for females. The ground colour of the forewings is whitish grey, densely scaled with dark brownish grey. The hindwings are brownish grey. Larvae have been reared on the fruit of Bothriocline species.