Abstract: A dispensing adaptor for one-component polyurethane foam, which is coupled to a valve stem of a polyurethane pressurized container, the dispensing adaptor including: a tubular main adaptor body coupled to the valve stem and introducing polyurethane foam out of the pressurized container; a stem coupling portion formed at one end portion of the adaptor main body and coupled to and communicating with the valve stem; a discharging pipe extended from the other end portion of the adaptor main body; a stationary lever formed integrally with and extended from an outer wall of the adaptor main body; and an extended lever curvedly extended from the stationary lever along a lengthwise direction of the pressurized container, and making the valve stem be inclined to open with respect to an axial direction.