Authors have experienced a case of suppurative dermoid cyst of ovary due to typhoid bacilli. 1. The patient is a 27 years old woman, para 2 without any past history of typhoid fever. Authors have isolated typhoid bacilli from the content of the cyst. 2. A brief reyiew of the mode of infection of pathogen causing suppuration of the cyst was made. 3. However, the mode of infection was obscure in this case.