Propeller fan for heat exchanger of in-vehicle air conditioner

There is provided a propeller fan (1) comprising: a rotary vane wheel (3) of an axial-flow type; and a shroud (2) placed downstream of an in-vehicle heat exchanger, in which a shape of an air path transits from a substantially rectangle to a circle, the rotary vane wheel (3) is provided at a portion where the shape of the air path becomes the circle, wherein from a vane surface on the negative pressure side of the rotary vane wheel (3) at a position on a concentric circle with the circle of the air path of the shroud (2), a plate-like protrusion (43,44,47) is provided toward an axial direction of the rotary vane wheel (3) in parallel to, or with such an angle as to form a taper with respect to, an inner wall of the air path in a portion of the shroud (2) surrounding the rotary vane wheel (3) in the circumferential direction.