Eurythecta robusta is a species of moth of the Tortricidae family. It is found in New Zealand. The habitat consists of open stony grounds.
The wingspan is 9.5–10 mm for both males and females. Adults are extremely variable in colour. The colour of the forewings ranges from white to grey whitish, ochreous or reddish-ochreous brown. There are dark fuscous or blackish markings. The hindwings are fuscous grey, but darker posteriorly and thinly scaled towards the base.
The larvae feed on low mat-forming herbs and turf plants.