An automatic transmission for a hybrid vehicle has a first clutch connecting a first drive gear shaft rotatably supporting drive gears G3a and G5a, to an input shaft, a second clutch connecting a second drive gear shaft, rotatably supporting drive gears G2a and G4a, to the input shaft, a first meshing mechanism connecting the drive gears G3a and G5a to the first drive gear shaft, a second meshing mechanism connecting the drive gears G2a and G4a to the second drive gear shaft, a brake fixing a third element of a planetary gear mechanism to a transmission case, and a switching mechanism switching to where an electric motor is connected to a first element or where the electric motor MG is connected to the third element. The first element and the first drive gear shaft are connected. A second element and the drive gear G3a are connected.