Palm methyl ester was employed to synthesize palmitoyl ethanolamide and palmitoyl diethanolamide in the presence of KOH. The yield of palmitoyl ethanolamide and palmitoyl diethanolamide was 92.2 % and 89.0 %, respectively. The properties of palmitoyl diethanolamide and coconut diethanolamide were compared. The palmitoyl diethanolamide and coconut diethanolamide have similar surface tension and emulsifiability, while palmitoyl diethanolamide present weaker foaming ability than coconut diethanolamide did. The addition of decanoyldiethanolamide can improve foaming ability of palmitoyl diethanolamide; a mixture of decanoyldiethanolamide to palmitoyldiethanolamide (1:2.5, mol:mol) present similar foaming to that of coconut diethanolamide, which is twice as high as that of palmitoyl diethanolamide.