The present invention relates to a method of producing a polyurethane foam as a blowing agent in the presence of a tertiary amine amide catalyst represented by the water, foam stabilizer, and the formula 1 which comprises reacting an organic polyisocyanate with a polyol. Formula 1 In the formula, A, R ¹ to R ⁶ and n are defined in the specification, Tertiary amino amide catalyst of formula I is acid-blocked.