Thomas Papas, 89, is missing from Monday morning January 13, from Agia Paraskevi Kozani.
The elderly man suffering from dementia left his home towards an unknown direction.
According to locals, the missing man was seen walking in the morning towards the exit of the village.
Drone searches were used to identify him, and all possible points that could be traced were explored.
His height is about 1.70 and on the day he disappeared he was wearing a gray pants, jacket and hat while holding a cane.
Silver Alert has been signaled for his disappearance.