Officers are appealing for information about the serious assault outside the Grand Olde Opry on Govan Road, near Paisley Road Toll.
Two men, aged 21 and 24, were attacked on Saturday, December 7 around 9.40pm.
Both men were taken by ambulance to the Southern General Hospital where they were treated for their injuries.
Detectives would like to speak to anyone who recognises the man in the image.
Contact police on 101 or call CRIMESTOPPERS on 0800 555 111 where information can be given anonymously.