Bartoszcze was born in Jaroszewice, and worked on his family farm there, and later in Sławęcin, until 1966. He did national service from 1966 to 1968.[2]
From 1969 to 1980 he was a member of Polish United Workers' Party satellite United People's Party (ZSL). In 1980 he broke with ZSL and joined oppositional Peaseant Solidarity, which was merged into Solidarity movement in 1981. During Martial law he was arrested and imprisoned for two months as a result of his participation in the Bydgoszcz events. After his release Bartoszcze acted in the All-Poland Peasants Resistance Committee and was an editor of newspaper Żywią i bronią.
In 1991 he left PSL and founded small conservative Polish People's-Christian Forum "Fatherland". Re-elected Sejm member in 1991 from Center Civic Alliance he retired from politics with his term ended in 1993.
His brother Piotr, who was also an opposition activist, was murdered by the Security Service.
