Police said they were called out around 9.30pm on Thursday (March 17) to a report of an assault in Queen Street, Morecambe.
A man in his 30s had suffered a stab wound at the Joiners Arms.
The man suffered a chest injury and was taken to Blackpool Victoria Hospital for treatment.
Two men, 25 and 23, both from Morecambe and a 29-year-old man from Lancaster were arrested on suspicion of assault and released on bail.