The finding of one specimen (IZUA-PM-2338, 875 mm TL) of Diastobranchus capensis Barnard, 1923 (Osteichthyes: Anguilliformes: Synaphobranchidae), captured at 2.000 m depth off Golfo de Penas, southern Chile (48º31’12’’S-75º15’04’’W) is reported and represents the first record of this genus for the southeastern Pacific. The ichthyogeographical meaning of this finding is also analyzed. A taxonomic key to recognize Chilean synaphobranchid eels is included