Disclosed is a shaft sealing device including: a housing in which an annular recessed portion is formed and which is fixed to a stator; a sealing body, a radially outer portion of which is accommodated by the annular recessed portion; and a high pressure-side sealing plate that is disposed along the sealing body in a high pressure region. An inflow groove is formed in any member of the housing, the high pressure-side sealing plate, and the sealing body such that a fluid flows through the sealing body from a low pressure region during a non-normal operation in which pressure in the high pressure region is higher than pressure in the high pressure region. A communication path is formed in the housing such that the inflow groove and a space in the high pressure region communicate with each other via the communication path.