[en] A transmission electron microscopy study of planar growth faults in the A15 intermetallic phase Nb₃Al is presented. These faults are not observed in plasma melted material but a high density of these features is observed in arc-melted material which is cooled more slowly. The faults are found most frequently on planes [100], often changing from one plane to another along their length. It has not been possible to obtain a full diffraction contrast analysis from the faults but HREM images indicate that they are intrinsic with a displacement vector R = 1/4<120>. Since this vector does not lie in the plane, they cannot form by glide processes alone and therefore probably arise when vacancies coalesce into sheets on [100]. Since this value of R is consistent with the removal of an Al-rich plane [004], it is argued that the formation of these faults may help to stabilize the A15 phase to Nb-rich composition