In a control apparatus for an automatic transmission having two input shafts connected to an output shaft of a prime mover; two output shafts; and two drive force transmission paths including clutches and synch devices each of which is able to connect a speed gear to the associated one of the output shafts, it is configured to discriminate whether shifting required by an operator is a first shifting pattern or a second shifting pattern, supply fluid pressure to one of the drive force transmission paths associated with a desired speed gear, while engaging the lockup clutch, when the shifting is the first shifting pattern, and supply the fluid pressure to the one of the drive force transmission paths associated with the desired speed gear, while disengaging the lockup clutch, when the shifting is the second shifting pattern.