A hybrid vehicle comprising: an internal combustion engine; a first rotary electric machine; a second rotary electric machine configured to output power to a drive wheel; a power transmission unit including an input element, an output element and an engaging portion (C1, B1), the input element being configured to receive power from the internal combustion engine, the output element being configured to output power input to the input element, and the engaging portion (C1, B1) being configured to be placed in a non-neutral state when supplied with hydraulic pressure or current and be placed in a neutral state when not supplied with hydraulic pressure or current, the non-neutral state being a state where power is transmitted between the input element and the output element, the neutral state being a state where power is not transmitted between the input element and the output element; a differential unit including a first rotating element, a second rotating element and a third rotating element, the first rotating element being connected to the first rotary electric machine, the second rotating element being connected to the second rotary electric machine and the drive wheel, the third rotating element being connected to the output element, and the differential unit being configured such that, when rotation speeds of any two of the first rotating element, the second rotating element and the third rotating element are determined, a rotation speed of the remaining one of the first rotating element, the second rotating element and the third rotating element is determined characterized by a clutch configured to be set to an engaged state when supplied with hydraulic pressure or current and be set to a released state when not supplied with hydraulic pressure or current, the engaged state being a state where power is transmitted from the internal combustion engine to the first rotary electric machine, the released state being a state where transmission of power from the internal combustion engine to the first rotary electric machine is interrupted, the clutch being provided in a second path that is one of a first path and the second path, through which power from the internal combustion engine is transmitted, the first path being a path through which power is transmitted from the internal combustion engine to the first rotary electric machine via the power transmission unit and the differential unit, and the second path being a path through which power is transmitted from the internal combustion engine to the first rotary electric machine via a path different from the first path; and an engagement prevention unit configured to, when the engaging portion (C1,B1) of the power transmission unit is supplied with hydraulic pressure or current, cut off supply of hydraulic pressure or current to the clutch. an internal combustion engine; a first rotary electric machine; a second rotary electric machine configured to output power to a drive wheel; a power transmission unit including an input element, an output element and an engaging portion (C1, B1), the input element being configured to receive power from the internal combustion engine, the output element being configured to output power input to the input element, and the engaging portion (C1, B1) being configured to be placed in a non-neutral state when supplied with hydraulic pressure or current and be placed in a neutral state when not supplied with hydraulic pressure or current, the non-neutral state being a state where power is transmitted between the input element and the output element, the neutral state being a state where power is not transmitted between the input element and the output element; a differential unit including a first rotating element, a second rotating element and a third rotating element, the first rotating element being connected to the first rotary electric machine, the second rotating element being connected to the second rotary electric machine and the drive wheel, the third rotating element being connected to the output element, and the differential unit being configured such that, when rotation speeds of any two of the first rotating element, the second rotating element and the third rotating element are determined, a rotation speed of the remaining one of the first rotating element, the second rotating element and the third rotating element is determined characterized by a clutch configured to be set to an engaged state when supplied with hydraulic pressure or current and be set to a released state when not supplied with hydraulic pressure or current, the engaged state being a state where power is transmitted from the internal combustion engine to the first rotary electric machine, the released state being a state where transmission of power from the internal combustion engine to the first rotary electric machine is interrupted, the clutch being provided in a second path that is one of a first path and the second path, through which power from the internal combustion engine is transmitted, the first path being a path through which power is transmitted from the internal combustion engine to the first rotary electric machine via the power transmission unit and the differential unit, and the second path being a path through which power is transmitted from the internal combustion engine to the first rotary electric machine via a path different from the first path; and an engagement prevention unit configured to, when the engaging portion (C1,B1) of the power transmission unit is supplied with hydraulic pressure or current, cut off supply of hydraulic pressure or current to the clutch.