The vehicular automatic transmission

A vehicular automatic transmission, comprising: a transmission (4) of the subtransmission mechanism (30), which rotational drive force of the engine (1) according to the plurality of frictional engagement elements engaged state, a released state of the determined combination of transmission ratio (7) is transmitted to the drive wheels; mechanical oil pump (10m), which (1) driven by an engine; and a controller (12), in the middle of deceleration of the vehicle, when the coast stop condition is established, the controller (12) of the engine (1) is stopped, even when coast stop condition is established, the plurality of friction coupling elements to change the coupling state of the subtransmission mechanism (30), a combination of shift release state, the controller (12) is not executed the engine (1) stops sliding stops, after the shift in the subtransmission mechanism (30) performs the coast stop.