The present invention relates to a method of producing an optically active 1-aryl-2-fluoro-substituted ethylamine compound of the formula [2] or a salt thereof by hydrogenolysis of an optically active secondary amine compound of the formula [1] or a salt thereof in the presence of a transition metal catalyst of Group VIII[Chem. 59] ##STR00001## [where Ar represents an aryl group; n represents an integer of 1 or 2; and * represents an asymmetric carbon] [Chem. 60] ##STR00002## [where Ar represents an aryl group; n represents an integer of 1 or 2; and * represents an asymmetric carbon].