To prevent a sudden start by setting a clutch into slow start coupling in the case that the opening of an actuated accelerator pedal is smaller than a certain value and the number of revolution of an engine is larger than a certain value when a speed change command is issued in a neutral state in an automatic transmission.

In this automatic transmission, the speed change operation of a manual transmission and the coupling operation of a clutch are carried out with an actuator. In this start control device in the automatic transmission, the clutch is set into the slow start coupling in the case that the opening of the actuated accelerator pedal is smaller than the certain value and the number of revolution of the engine is larger than the certain value when the speed change command is issued in the neutral state.