Christopher Doyley, 50, was released from Hollesley Bay prison on a temporary release licence but failed to meet at an agreed location in Ipswich town centre on Wednesday.
Mr Doyley is serving a six year and six month sentence for attempted grievous bodily harm, assault and possession of a bladed item in a public place, Suffolk police said.
The force described Doyley as black, six feet tall, of medium build, with brown eyes, black hair and clean shaven. He has links to south east London.
The public is warned not to approach Mr Doyley and to call police immediately.
If anyone has any information about his whereabouts, contact Suffolk Police on 101 quoting CAD reference 317.