 In the elections to the fifteenth Knesset, in 1999, Oshaya was left out until 2001, when Uzi Baram retired from politics.He remained in the Knesset until the expiration of its term, in 2003, and during this time served as group chairperson for One Israel (a list comprising the Labor Party, Gesher and Meimad).In 2006 he re-entered the Knesset, replacing Haim Ramon, but resigned less than 24 hours later due to conflict of interest with his professional work in lobbying.