We investigated in experiment the effect of exit Reynolds number on self-preservation of a turbulent plane jet. Centerline velocity statistics were measured in plane jets issuing from the same nozzle but， respectively， with seven Reynolds numbers varying between Re = 4，582 and Re = 57，735， where Re ≡ Uj h/ν（Uj being the momentum-averaged exit mean velocity， h the slot height and ν　the kinematic viscosity）. All measurements were conducted using single hot-wire anemometry and over an axial distance （x） of 40　h. These measurements revealed a significant Re-dependence of either the mean or turbulent flow field.　As Re increases， the pace of the jet development decreases and， as a result， both the mean and turbulent properties reach their self-preserving states over a longer downstream distance （x）.　The centerline integral scale L　for all jets grows linearly with x and the growth rate decreases as Re is increased. It is also found that the local Reynolds number ReL scales with x as ReL∝x1/2. The study suggests that differences of the self-preserving states observed may be related to the differences in the underlying turbulence structures in the near field of the seven jets.