A wheelchair user robbed at knifepoint in a terrifying attack on the weekend says he is considering not going out at night again after fearing he was going to be killed.

George Nicholls, who lives with multiple sclerosis, was tipped on the ground and robbed in East Victoria Park on Sunday night after he was confronted by a man asking for a cigarette.

The man then stole his wallet and keys, while the 52-year-old lay on the ground where he remained until the police arrived.

The 52-year-old was on his way home at about 8.30pm after visiting a friend nearby but said he will now think twice before heading out at night.

Three years ago Mr Nicholls was robbed and his wheelchair stolen in a similar area and he says Sunday's incident is the last straw.

Camera Icon The incident happened in East Victoria Park on Sunday night.

“I have great trouble walking, moving around in a wheel chair most days,” he told 7 News Perth

“He had a big carving knife in his hand... in front of my face saying ‘I want your wallet and your phone’.

“I'm not going out at night ever again. I just don't feel safe.”

The attack took place as Mr Nicholls rounded the corner of Shepparton Road into Cardiff Street - where the man stepped in front of him.

Mr Nicholls says he told the thief he didn't have anything on him, sparking the man to walk behind his wheelchair and tip him out.

The man took his wallet and keys and fled down Shepparton road on a bike, throwing the keys back as he left.

Police are looking for a fair-skinned, tall and skinny man in his 20s or 30s who was riding a blue mountain bike with a brown milk crate on the back.

Anyone with information is asked to contact Crime Stoppers on 1800 333 000 or make a report online.