The Hog's Breath Cafe has apologised to a Brisbane customer after she found a sink plug in her salad during the weekend.

The customer posted an image on Hog's Breath Aspley Facebook page, where it was "liked" more than 2000 times.

A Hog's Breath Cafe customer has found a sink plug in a salad.

Hog's Breath Cafe Australian general manager Ross Worth said the company had been in contact with the woman and apologised.

He said food hygiene was a top priority for the company and they had notified local health authorities about the incident.