People with coeliac disease can now dine out without fear of cross-contamination or illness at Australia's first completely gluten-free restaurant.

A Melbourne restaurant has become Australia's first official, completely gluten-free eatery.

Delhicious Indian and Modern Cuisine in Ivanhoe got Coeliac Australia accreditation on Monday, meaning people with coeliac disease can dine there without fear of cross-contamination or illness.

While gluten-free options are available at many restaurants, meals are still likely to be contaminated by gluten, Coeliac Australia says.

"Eating out is one of the biggest challenges faced by people with coeliac disease today," President Michael Bell said.

"With Coeliac Australia accreditation, gluten free consumers know that a business follows best practice for gluten free food preparation."

One in 70 Australians have coeliac disease but more than 80 per cent of cases go undiagnosed.

People who suffer from coeliac disease or have an intolerance to gluten - which is found in wheat,barley,ryeandoats - have to drastically change their diet to avoid symptoms.