A brake system (1701) includes a brake operating unit (1754) which activates first a central rear brake (1073) to operate and lastly activates a front brake of a right front brake (1072) and a left front brake (1071) which is provided on a front wheel which constitutes an inner wheel having a small turning radius to operate by operating an input member (1752). When an operation amount of the input member (1752) from an initial state to a maximum operated state thereof is divided equally into three portions which are defined as a low braking force area, a middle braking force area and a high braking force area, the brake operating unit (1754) activates the central rear brake (1073), the right front brake (1072) and the left front brake (1071) to operate in the low braking force area.
