In an operation using a blow operation device driven by an electric motor, fatigue in the arm of an operator is reduced. A blow operation device includes a backpack type frame, a battery attached to the frame, a blower body having an electric motor to which power is fed from the battery and having an axial fan driven by the electric motor, and a blower tube connected to a blow side of the blower body, the blower body being supported pivotally on the frame to be rockable vertically and horizontally.