Abstract: Fatigue crack growth rates in AISI 316 austenitic stainless steel plates containing notches have been measured under biaxial stress fields for a variety of stress levels at room temperature. It was found that crack growth rates were affected by biaxiality of stress only in local areas near notches for the tested material. In these areas, they were slower in equibiaxial case and faster in pure shear compared to crack growth rates in uniaxial loading. In the regions beyond the influence of notches, all results obtained in the study obeyed Paris' law. It is therefore suggested that the exhibited effects of biaxiality at notches may be due to the stress distributions along expected crack lines. The distributions are associated with notch stress concentration factors which are different for various biaxial stress states for the same notch.