A hybrid drive device (1) configured by disposing the input shaft (7) of an automatic transmission on a first axis (I) which is coaxial with the engine output shaft (2) and by disposing an electric motor (6) on a second axis (II) which is different from the first axis (I). An intermediate shaft (4) which is disposed on the first axis (I) is formed integrally with a first gear (23) so as to extend forward thereof, and rotation having a reduced speed is transmitted from the electric motor (6) to the first gear (23). The intermediate shaft (4) is supported by a first support wall (12b) through a bearing (45), connected in front of the first support wall (12b) to the engine output shaft (2) through a damper (29) and a clutch (27), and connected behind the first support wall (12b) to the input shaft (7) and spline (26).