A snow plow-blower operates as a snow plow, snow blower, or as a snow plow-blower combination. The device includes a plow head blade optionally having retractable/pivotal scoop wings and a cavity with an aperture with blower doors and a blower unit. The snow blower unit includes an auger and impeller to move snow into the unit and force it out of a discharge chute. Blower doors are provided over the snow blower unit cavity to prevent snow from entering into the cavity when the blower is off. Optionally, the blower doors move along a track and rest flush against the plow head to open and close off access to the cavity. Alternatively, the blower doors are hingedly mounted to pivot to open and closed positions. The blower doors may be constructed to operate as blower blades to direct snow into the blower unit; alternatively, separate blower blades are provided to optimize snow removal and mitigate jamming/clogging.