Olfactory dysfunction has been identified in neuropathy and psychiatric disorders in prior research. There have been increasing studies on olfactory function of bipolar disorder in recent years. Brain areas involved in the mechanism of bipolar disorders have a close connection with the olfaction function related areas on the aspects of anatomy. The study of olfactory function in bipolar disorders is helpful to understand its pathogenesis and early recognition. This review summarizes the relevant findings concerning the olfactory function of bipolar disorders， and also provides some ideas and suggestions for future research