A man has died following a collision on the A508 near Courteenhall on Saturday.
The crash happened at about 10.35am near to junction 15 of the M1.
A blue Skoda Fabia was in collision with a silver Honda motorbike.
The motorcyclist, a 47-year-old man from Northampton, was taken by air ambulance to University Hospital Coventry with serious injuries. He died at the hospital yesterday.
Witnesses to this incident, or anyone who has any information, is asked to contact Northamptonshire Police on 101 or call the Drivewatch Hotline on 0800 174615.