A power output apparatus that outputs power to a driveshaft, the power output apparatus includes an internal combustion engine, a change-speed transmission mechanism, a connection disconnection structure, a power shaft rotation speed measurement unit, an input shaft rotation speed measurement unit, a start connection control module, and a start connection control module controlling at least one of the internal combustion engine and the change-speed transmission mechanism to make the power shaft rotation speed of the internal combustion engine approach to the input shaft rotation speed of the change-speed transmission mechanism, and controlling the connection disconnection structure to connect the power shaft of the internal combustion engine with the input shaft of the change-speed transmission mechanism at the set fluid supply start timing.