The loyal customers of a Melbourne chicken shop have rallied behind their favourite takeaway spot as its owner battles against a huge KFC billboard that's gone up on one of his businesses.

Chicken shop owner Jim spoke exclusively to A Current Affair , accusing KFC of trying to pluck his customers from his front door.

The sign reads: "KFC only 800m away. Bucket. Why not?"

Chicken shop owner Jim is unhappy with a huge KFC ad on a billboard on the front of his shop. (A Current Affair)

"When I saw it, it was just like … this Goliath of a thing on my wall, think, 'why are you here?'" Jim said.

The fast-food chain is on an advertising blitz in the area, erecting billboards to lure shoppers from Jim's shop to KFC.

But one of Jim's workers says it'll never happen.

"I don't know why they spent so much money putting a sign on that wall," she said.

"They're not going to steal our customers.

One of Jim's workers says customers won't be lured away to the fast-food joint. (A Current Affair)

"It's on! Go Chicken Central!"

The shop is a hit with local tradies working on construction projects in the area.

And many of the customers told A Current Affair they went out of their way to get a hearty Chicken Central meal, and they slammed the placement of the KFC ad.

"I just think it's ethically corrupt," one man said.

Another customer said it was "disrespectful".

Jim said his chicken was tastier than what KFC offered. (A Current Affair)

Jim remains confident that his chicken reigns supreme, claiming his seasoning was tastier than KFC's famed secret herbs and spices.

"If they're so secret about it, what are they hiding?" he said.

But he still wants the advertisement gone.

"I don't mind other billboards being on there. We've had school advertising, alcohol advertising, all sort of different businesses advertising on our billboard. KFC - that's crossed the line in my opinion," he said.

The KFC sign went up after Jim complained about a repeatedly-vandalised United Australia Party sign. (A Current Affair)

Jim said the KFC sign went up a week after he complained about a United Australia Party sign that had been riddled with graffiti.

Jim told A Current Affair it was hard enough running a small business without a multinational competitor muscling in on his front wall.

"Everyday is a challenge. I put 90 hours a week into the business, and between the families and the guys that work for us, we all bust a gut to try to get the job done right," he said.

"I just don't understand how KFC or any other brand that sells chicken or direct opposition to us wants to come and put their billboard on our building.

"Why would you want to walk 800 metres when the best chicken in Melbourne is here?"

Jim said he was confident KFC would "see the light". (A Current Affair)

A Current Affair has contacted the owner of the billboard JCDecaux, but it is still waiting for a response.

"I think the right thing will prevail. KFC will see the light, and they'll go, 'yep, let's remove it'," Jim said.

In a statement, a KFC spokesperson said they had never intended to cause any difficulty for Chicken Central.

"Since learning of Chicken Central's concern, our franchisee has asked for the sign to be removed by the end of the week," the spokesperson said.