An analytical formula has been derived for the turbulent diffusivity at the leading edge of a stationary turbulent planar flame, described by the Bray-Moss-Libby (BML) model- The formula is derived from an expression for the turbulent burning velocity, formulated by Hakberget al. (1993) and validated in the case of negligible heat release. The turbulent diffusivity at the leading edge depends on the straining of the flame front, for the BML flamelet model, but is close to the cold flow diffusivity in the limit of high rates of strain.