Firefighters discovered a body when they were called to reports of a burning car at the side of the road in Ripponden.
Police were called by the fire service to Blue Ball Road at about 11.15 on Thursday morning.
A fire damaged car was found at the scene which contained the body of an adult.
Local roads were closed while the body and the vehicle were recovered.
A police spokesman said a post mortem examination would be conducted and inquiries were continuing to determine the circumstances.