A cone ring CVT is applied to the disclosed hybrid drive device, and a compact arrangement is used for the device as a whole. An input-side friction gear (22) is disposed on a first shaft (I) that is coaxial with an engine output shaft, an output-side friction gear (23) is disposed on a second shaft (II), and an electric motor (2) is disposed on a third shaft (III) that is parallel to the first and second shafts. The electric motor (2) and the cone ring CVT (3) are disposed in a manner so as to partially overlap in the axial direction. Viewed in the axial direction, the third shaft (III) is disposed on the same side as the friction gear (23) that is not enclosed by the ring with respect to a line (v-v) that is perpendicular to a line (p-p) that connects the first shaft (I) and the second shaft (II) and that passes through the center (t) of the ring (25) when the ring has moved maximally towards the shaft center (II) of the friction gear (23) that is not enclosed by said ring.