With relatively small nozzle-to-plate spacing, heat transfer characteristics of an axisymmetric impinging jet were studied on the basis of the flow structures visualized by using flow visualization techniques. The Reynolds number based on the nozzle diameter (D=40mm) and the nozzle exit velocity was varied in the range of 3000<Re<12000. The range of the nondimensional nozzle-to-plate spacing was 1&lnE