Aster Fissehatsion (also known as Astier Fesehazion) (born 1956) was an Eritrean politician and an Amnesty International prisoner of conscience.
On 18 September 2001, she was detained indefinitely along with other politicians of G-15, a group which opposed the rule of Eritrean president Isaias Afewerki.
She joined Eritrean People's Liberation Front (EPLF) in 1974 and became a leading figure in the struggle for independence in Eritrea.
In May 2001, she was one of 15 senior party officials, later known as the G-15, who published an open letter calling for "peaceful and democratic dialogue"; and calling on President Isaias Afewerki to adhere to correct parliamentary and governance procedures, hold internal party meetings, and keep the promises made by the PFDJ in respect of judicial reform.
On 18 September 2001, she was detained indefinitely along with other politicians of G-15, a group which opposed the rule of Eritrean president Isaias Afewerki.