A start control apparatus is provided with: a crank angle sensor configured to output a signal in association with rotation of an output shaft of an internal combustion engine; a resolver configured to detect a rotor angle, which is an angle position of a rotating shaft of a motor; and a controlling device configured to perform start control associated with the internal combustion engine on the basis of a temporary crank angle, from a start of the internal combustion engine until determination of a crank angle in starting of the internal combustion engine, wherein the temporary crank angle is an estimated value calculated by adding a value according to the outputted signal to a stop angle, which is an angle based on the rotor angle detected at a previous stop of the internal combustion engine.