A former One Nation media adviser jailed for the rape and assault of a woman has lost an appeal against his conviction.

In the Brisbane District Court last year, Sean David Black, a former staffer for Senator Malcolm Roberts, was found guilty of one count of rape and two counts of assault.

Ex-One Nation adviser Sean Black sentenced. Credit:AAP

He failed to appeal against his five-year jail sentence, which will be suspended after two-and-a-quarter years.