Two police officers have been left red-faced after confusing a man's Sons of Anarchy t-shirt with a real bikie gang's patch in Queensland.

Police saw the man's shirt, showing the insignia of the fictitious bikie gang in the popular US TV drama, during a protest at Emerald, where state cabinet is meeting.

Queensland police have mistaken a fan of the TV show Sons of Anarchy for a bikie.

Two officers walked over and began talking to him about it but it soon dawned on them that he was just a fan of the TV show, and not a hardened bikie crim.

After awkward laughter, the officers apologised and left him alone.