Police are appealing for witnesses to an assault outside Bletchley Bus Station last Sunday.
The assault occurred outside the bus station in Saxon Street at about 7.25pm.
The victim, a 32-year-old man, was walking with a family member when he was approached by another man who punched him in the face.
The offender then left on foot towards Bletchley town centre.
The suspect is described as white, clean shaven, in his mid-20s, of stocky build, with short dark brown spiky hair, which was gelled.
He was wearing a blue and white short sleeved T-shirt and jeans.
If you have any information about the offence contact PC Jacqueline Baverstock on 101.