A protection mechanism for a working vehicle includes a roof provided above an operator's seat, a pillar extending upward from a vehicle body and supporting the roof, a camera with a predetermined viewing direction, and a support stay which is connected to the pillar, orients the predetermined viewing direction of the camera sideways, and supports the camera below a peripheral portion of the roof. The protection mechanism includes a front pillar supporting a front portion of the roof and a rear pillar supporting a rear portion of the roof. The support stay is connected to the rear pillar.