A blower comprising: an axial flow blower fan that is rotatably driven to generate an airflow; and a shroud provided with a suction port through which air is drawn into the blower fan , and an air outlet through which air is blown out of the blower fan , the blower fan including: a plurality of blades radially extending from a boss provided at a rotation center and spaced apart from each other in a rotational direction; and a ring portion connecting outer peripheral ends of the blades in a circumferential direction, wherein an inner peripheral wall surface of an end part on an air-flow downstream side of the air outlet is disposed on an outer side in a radial direction of a rotary shaft in the blower fan , with respect to an end part on the air-flow downstream side of the ring portion , and the end part on the air-flow downstream side of the air outlet is positioned outward in the radial direction of the rotary shaft, as toward the air-flow downstream side, the ring portion includes a flange that extends from an air-flow upstream end of the ring portion toward an outside in the radial direction of the rotary shaft, the flange being integrally formed with the ring portion , and a gap size between the end part on the air-flow downstream side of the air outlet and the ring portion is enlarged from an upstream side to a downstream side of the air flow, characterized in that the end part on the air-flow downstream side of the air outlet is linearly inclined outward in the radial direction of the rotary shaft, as toward the air-flow downstream side, or has a cross-section formed with a stepped shape such that the end part is spaced apart from the ring portion in a stepwise manner toward the air-flow downstream side. an axial flow blower fan that is rotatably driven to generate an airflow; and a shroud provided with a suction port through which air is drawn into the blower fan , and an air outlet through which air is blown out of the blower fan , the blower fan including: a plurality of blades radially extending from a boss provided at a rotation center and spaced apart from each other in a rotational direction; and a ring portion connecting outer peripheral ends of the blades in a circumferential direction, wherein a plurality of blades radially extending from a boss provided at a rotation center and spaced apart from each other in a rotational direction; and a ring portion connecting outer peripheral ends of the blades in a circumferential direction, wherein an inner peripheral wall surface of an end part on an air-flow downstream side of the air outlet is disposed on an outer side in a radial direction of a rotary shaft in the blower fan , with respect to an end part on the air-flow downstream side of the ring portion , and the end part on the air-flow downstream side of the air outlet is positioned outward in the radial direction of the rotary shaft, as toward the air-flow downstream side, the ring portion includes a flange that extends from an air-flow upstream end of the ring portion toward an outside in the radial direction of the rotary shaft, the flange being integrally formed with the ring portion , and a gap size between the end part on the air-flow downstream side of the air outlet and the ring portion is enlarged from an upstream side to a downstream side of the air flow, characterized in that the end part on the air-flow downstream side of the air outlet is linearly inclined outward in the radial direction of the rotary shaft, as toward the air-flow downstream side, or has a cross-section formed with a stepped shape such that the end part is spaced apart from the ring portion in a stepwise manner toward the air-flow downstream side. is linearly inclined outward in the radial direction of the rotary shaft, as toward the air-flow downstream side, or has a cross-section formed with a stepped shape such that the end part is spaced apart from the ring portion in a stepwise manner toward the air-flow downstream side. <EOS>