Braking system for motorcycle

A braking system (30) includes a first hydraulic pressure detection section (43), a second hydraulic pressure detection section (46) and a control unit (28). The first hydraulic pressure detection section (43) detects hydraulic pressure of a portion of a first brake fluid passage (42) closer to a first master cylinder (40a) than a portion of the first brake fluid passage (42) to which one end of a third brake fluid passage (47) is connected. The second hydraulic pressure detection section (46) detects hydraulic pressure of a portion of the first brake fluid passage (42) closer to a first braking force generating mechanism (35) than a portion of the first brake fluid passage (42) to which the other end of a third brake fluid passage (47) is connected. The second hydraulic pressure detection section (46) has higher detection accuracy of hydraulic pressure and lower resistance to pressure than the first hydraulic pressure detection section (43). The control unit (28) carries out associationed control when the second operation member is operated. When the associationed control is not in operation, the control unit (28) determines an operation amount of a first operation member (18) based on a detection value of the second hydraulic pressure detection section (46). When the associationed control is in operation, the control unit (28) determines the operation amount of the first operation member (18) based on a detection value of the first hydraulic pressure detection section (43).