Doris Lessing`s short story ------ One off the Short List, like most of her famed novels, is a manifestation of individual`s living state in the lonely and absurd world. In this thesis, the writer attempts to interpret this story from the view of Sartrean existentialism by analyzing the middle aged protagonist`s special journey of exploring himself with suffering of being “others” so as to indicate Lessing`s pessimistic attitude to modern people`s existence.