Pool boiling heat transfer characteristics of liquid 3He were measured for the first time using the 3He circulation system under saturated vapour pressure at about 1.5 and 2.0 K. The heat transfer surface was a flat plate of 6 mm diameter made of OFHC and set upward. The results show that the ΔT dependence of q., where ΔT is the temperature difference between heat transfer surface and liquid 3He and q. is heat flux, is in good agreement with Kutateladze's correlation in nucleate boiling region, and in the film boiling region both ΔT dependence and absolute values of q. are in reasonable agreement with Breen and Westwater's correlations. © 1989.