Subodh wife Pratima met him at city-based Vidya Sagar institute of Mental Health, where he was admitted since 2007, officials said.
Subodh's son Kuku Mani said his father went missing in 1994 from their village Akui. The family later assumed him dead after police expressed their inability to find him.
Pretima said Subodh's last rites were performed long back by the family.
She said she was not aware of how her husband landed in Pakistani jail.
B L Goel, director of the hospital, said Subodh had come from Pakistan in 2007 along with other prisoners. He was mentally disturbed and as no one had come to receive him, the administration got him admitted in the hospital.
"He couldn't even tell his name earlier but his condition is better now...His language was difficult to understand for doctors as it was Begnali...Recently we called up some BSF men who understand his dialect and during conversation they found out that he was from West Bengal.
"We contacted the administration there and his family was traced. They were called to Amritsar and finally Subodh was reunited with his family," Goel said.