The accident happened at about 2pm in Olshammar, near Askersund, 250 kilometres west of Stockholm.
The container fell directly on to the car, crushing the vehicle and leaving the driver dead. There are no reports that the car was carrying passengers. Police say the man was dead when they arrived at the scene.
The driver of the truck is not currently suspected of any criminal offence.
“The investigation will show whether the container was badly attached,” said police spokesman Stefan Ekberg.