Abieta-7,13-dien-18-al dehydrogenase (, abietadienal dehydrogenase (ambiguous)) is an enzyme with systematic name abieta-7,13-dien-18-al:NAD<sup>+</sup> oxidoreductase. This enzyme catalyses the following chemical reaction:
The enzyme catalyses the last step of the pathway of abietic acid biosynthesis in Abies grandis.