A working vehicle comprising: a PTO shaft configured to transmit, to a working device, power of a propulsion shaft through which power of a prime mover is transmitted; a PTO clutch device having: a first rotor member configured to be rotated by the power of the propulsion shaft; a second rotor member configured to transmit the power to the PTO shaft; a pressing member configured to be moved within a housing by a pressure of operation fluid between an engaging side on which the first rotor member is engaged with the second rotor member and a disengaging side on which the first rotor member is disengaged from the second rotor member; a supply chamber formed in the housing and configured to be supplied with the operation fluid and to supply the operation fluid; and a spring configured to apply a biasing force to the pressing member such that the pressing member moves to the disengaging side, the pressing member being configured to move to the engaging side against the biasing force of the spring when the operation fluid is supplied into the supply chamber so as to increase the pressure of the operation fluid in the supply chamber, and to move to the disengaging side when the operation fluid is discharged from the supply chamber so as to decrease the pressure of the operation fluid in the supply chamber; a control valve configured to control the pressure of the operation fluid in the supply chamber of the PTO clutch device; characterized in that the working vehicle comprises: a PTO brake having a first contact member configured to move in the housing with the pressing member and a second contact member fixed inside the housing, the PTO brake configured to brake the PTO shaft when the pressing member is positioned on the disengaging side; a rate-setting portion (165A, 165B) configured to set, with the control valve, a reducing rate at which the pressure of the operation fluid is reduced; and a controller device configured to control the control valve based on the reducing rate set by the rate-setting portion (165A, 165B), when the pressing member moves from the engaging side to the disengaging side and the first contact member contacts the second contact member so as to brake the rotating propulsion shaft. a PTO shaft configured to transmit, to a working device, power of a propulsion shaft through which power of a prime mover is transmitted; a PTO clutch device having: a first rotor member configured to be rotated by the power of the propulsion shaft; a second rotor member configured to transmit the power to the PTO shaft; a pressing member configured to be moved within a housing by a pressure of operation fluid between an engaging side on which the first rotor member is engaged with the second rotor member and a disengaging side on which the first rotor member is disengaged from the second rotor member; a supply chamber formed in the housing and configured to be supplied with the operation fluid and to supply the operation fluid; and a spring configured to apply a biasing force to the pressing member such that the pressing member moves to the disengaging side, the pressing member being configured to move to the engaging side against the biasing force of the spring when the operation fluid is supplied into the supply chamber so as to increase the pressure of the operation fluid in the supply chamber, and to move to the disengaging side when the operation fluid is discharged from the supply chamber so as to decrease the pressure of the operation fluid in the supply chamber; a first rotor member configured to be rotated by the power of the propulsion shaft; a second rotor member configured to transmit the power to the PTO shaft; a pressing member configured to be moved within a housing by a pressure of operation fluid between an engaging side on which the first rotor member is engaged with the second rotor member and a disengaging side on which the first rotor member is disengaged from the second rotor member; a supply chamber formed in the housing and configured to be supplied with the operation fluid and to supply the operation fluid; and a spring configured to apply a biasing force to the pressing member such that the pressing member moves to the disengaging side, the pressing member being configured to move to the engaging side against the biasing force of the spring when the operation fluid is supplied into the supply chamber so as to increase the pressure of the operation fluid in the supply chamber, and to move to the disengaging side when the operation fluid is discharged from the supply chamber so as to decrease the pressure of the operation fluid in the supply chamber; a control valve configured to control the pressure of the operation fluid in the supply chamber of the PTO clutch device; a PTO brake having a first contact member configured to move in the housing with the pressing member and a second contact member fixed inside the housing, the PTO brake configured to brake the PTO shaft when the pressing member is positioned on the disengaging side; a rate-setting portion (165A, 165B) configured to set, with the control valve, a reducing rate at which the pressure of the operation fluid is reduced; and a controller device configured to control the control valve based on the reducing rate set by the rate-setting portion (165A, 165B), when the pressing member moves from the engaging side to the disengaging side and the first contact member contacts the second contact member so as to brake the rotating propulsion shaft.