A section of the town centre was cordoned off after police officers responded to reports of a gun incident.
They were called to an area outside the Cat and Fiddle pub on Cheapside at just after 11am. There had been a sighting of a gun down a grate.
Police are in the process of reopening a busy Halifax town centre street after sightings of a firearm.
A spokesperson for West Yorkshire police said: "Officers attended the scene and at around 1:30pm they were able to determine that the object was a toy plastic gun."