PURPOSE: To provide a method capable of economically producing the objective primary aminoamine-based compound under an industrially advantageous conditions while suppressing formation of by-products such as a secondary amine or a tertiary amine.

CONSTITUTION: An N-cyanoethylamide-based compound of the formula I (R1 is H, a 1-21C alkyl or a 3-18C cyclic alkyl) or the formula II (R2 is a single bond, a 1-21C alkylene or a 3-14 cyclic alkylene) is catalytically hydrogenated in the presence or absence of a solvent by using one or more hydrogenating catalysts selected from a Raney cobalt-based catalyst and a Raney nickel-based catalyst at 50-150°C, preferably 80-120°C to provide a primary amidoamine-based compound of the formula III or the formula IV. In order to maintaining catalytic activity and improve the yield of the objective compound, the reaction is preferably carried out in the presence of the solvent and an aliphatic ether compound of the formula V (R3 and R4 are each a 1-6C alkyl; (n) is 1 to 5) is preferably used as the solvent. Existence of 0.005 to equivalent weight based on the raw material compound of water can improve the reaction rate and shows excellent effects especially in a solventless system.