The present invention relates to a blower blower that is blown to the user's back while being mounted on the lawn mower, and more specifically, driven bevel gear drive by intermittently connecting the driven bevel gear and the fan drive wire using a needle roller bearing. It provides the blower of the mower to connect the power to the end of the fan drive wire, but to make the fan drive wire idle by the blowing fan when the driven bevel gear is stopped so that torsion of the fan drive wire does not occur. The purpose is. And, in order to achieve the above object, the present invention is blown while being transmitted to the fan drive wire 31 by the driven bevel gear 34 and the connecting pin 35 when the drive bevel gear 33 of the drive shaft 32 is driven In the blower of the lawn mower configured to rotate the fan 20 to blow to the worker's back through the blowing duct 15 and the blowing hole 13, between the driven bevel gear 34 and the connecting pin 35 A power intermittent bearing 40 is installed in the power intermittent bearing 40, the outer circumferential surface of which is ring-shaped bearing body 41 engaged with the inner circumferential surface of the driven bevel gear 34； Rolling ball guide groove 42 is provided at a predetermined interval along the inner circumferential surface of the bearing body 41； Rolling ball ball 44 for power intermittent to move the outer circumferential surface of the connecting pin 35 while moving elastically by the elastic member 46 along the rolling ball guide groove 42； Retainer 48 is provided between the inner circumferential surface of the bearing body 41 and the outer circumferential surface of the connecting pin 35； while being transmitted to the connecting pin 35 when the driven bevel gear 34 is rotated, the driven To provide a blower of the lawn mower, characterized in that configured to induce idle rotation of the fan drive wire 31 and the connecting pin 35 during the inertial rotation of the blowing fan 20 by the sud
