The crash on Stockbridge Road involved a lorry and two motorbikes and happened shortly after 17:15 BST on Wednesday.
The 63-year-old biker from Southampton died at the scene.
Hampshire Constabulary said the lorry driver, a 57-year-old man from Tidworth, was arrested on suspicion of causing death by dangerous driving following the crash.
He was later bailed pending further inquiries.
The second motorcyclist was taken to hospital with minor injuries.
Officers have appealed for witnesses to come forward.
A motorcyclist has died after being involved in a crash with a lorry in Leckford, Hampshire.