A Brooklyn scam artist pleaded guilty Tuesday to serving as a middleman in a telemarketing lottery scheme that targeted elderly people.

Sharon Rickenbacker, 31, and his cohorts tricked their victims into believing they had won the lottery — but first had to pay a fee in order to claim the winnings.

Between June 2014 and October 2015, the victims had turned over more than $250,000 to Rickenbacker, court papers say.

He faces 15 to 21 months in prison when he’s sentenced in Brooklyn federal court to conspiracy to commit mail and wire fraud.