Riine Pajusaar was born in Tallinn in 1971. Studying piano at the Tallinn Music High School (1978–89) and the Estonian Music Academy (1989–94) with Ene Metsjärv and prof. Heljo Sepp, she also took lessons in composition from Alo Põldmäe.
Since 1995 she has been teaching piano and improvisation at Keila Music School. Riine Pajusaar has written songs and piano pieces for children. In 2006, she released her first song album „Tabatinna“.