Helicopters and dogs have also been used in the search.
The man was found on the outskirts of Stenungsund, just outside the search area.
Relatives have been notified and the police do not suspect any crime.
- We have blocked off the site and the technicians must document it properly.
But no crime what we can see at the moment, says Peter Adlersson who is the police spokesman.
The 82-year-old man was found out in a meadow by a private person who sounded the alarm.