A 22-year-old man was stabbed after becoming embroiled in an argument in Ma Kelly's in London Street, Fleetwood, police said.
Officers have today released CCTV images of two men they want to speak to about the attack, which happened at around 11pm on Sunday, May 14.
The victim escaped with minor injuries and did not realise he had been cut until after he left the pub, a spokeswoman for Lancashire Police said.
She said he also suffered a broken tooth after being punched after 'getting involved in an altercation with someone'.
"He suffered a stab wound with a sharp implement," she added, describing the man's injury as a 'small laceration.'
"There were two people present but the victim could not say who caused the injuries."
No arrests have been made. Witnesses and those with information have been asked to call 101, quoting reference number WD1703000.