Police are appealing for witnesses of the collision to get in touch.
They were called by the ambulance service at around 10.10am today, 8th September, to reports of a single vehicle collision involving a motorcycle on the A143 near to HMP Highpoint Prison.
The motorcyclist, a man in his 50s, was treated my paramedics but died at the scene.
The road is currently closed in both direction to allow an investigation to continue. Members of the public that require access to the prison are advised to approach the site from the north (Bury St Edmunds).
Police say the road is expected to be closed for several hours.
Anyone who witnessed it or has any information are asked to contact police on 101 quoting CAD 117 of 8th September.