A hybrid drive device including a rotary electric machine having a stator and a rotor, a transmission coupled to the rotary electric machine, a clutch that couples an engine and the rotary electric machine and that releases a connection of the two, and a case for housing the rotary electric machine and the clutch, the hybrid drive device comprising: a first transmitting shaft coupled to an output shaft of the engine; and a second transmitting shaft that transmits power from the rotor of the rotary electric machine to the transmission, wherein the first transmitting shaft includes a first end portion on the engine side and a second end portion on the transmission side and is supported in a radial direction between the first and second end portions (141a, 141b) in an axial direction by the case via a first radial bearing, the second end portion of the first transmitting shaft is inserted into an end portion on the engine side of the second transmitting shaft formed in a tubular shape, a second radial bearing that supports the second transmitting shaft in the radial direction is disposed between an outer peripheral surface of the second end portion of the first transmitting shaft and an inner peripheral surface of the end portion of the second transmitting shaft, and the second transmitting shaft is supported in the radial direction by a shaft support portion provided in the case on the transmission side of the end portion via a third radial bearing, characterized in that the third radial bearing is located on an inner peripheral surface of the shaft support portion, and the hybrid drive device further includes a rotor support member that supports the rotor of the rotary electric machine and that is fixed to the second transmitting shaft through splines at a fixing portion (f), the rotor support member is fitted to the second transmitting shaft on the engine side of the shaft support portion of the case, and the fixing portion (f) of the rotor support member and the second transmitting shaft is at least partially overlapped with the second radial bearing in the axial direction when viewed in the radial direction. a first transmitting shaft coupled to an output shaft of the engine; and a second transmitting shaft that transmits power from the rotor of the rotary electric machine to the transmission, wherein the first transmitting shaft includes a first end portion on the engine side and a second end portion on the transmission side and is supported in a radial direction between the first and second end portions (141a, 141b) in an axial direction by the case via a first radial bearing, the second end portion of the first transmitting shaft is inserted into an end portion on the engine side of the second transmitting shaft formed in a tubular shape, a second radial bearing that supports the second transmitting shaft in the radial direction is disposed between an outer peripheral surface of the second end portion of the first transmitting shaft and an inner peripheral surface of the end portion of the second transmitting shaft, and the second transmitting shaft is supported in the radial direction by a shaft support portion provided in the case on the transmission side of the end portion via a third radial bearing, characterized in that the third radial bearing is located on an inner peripheral surface of the shaft support portion, and the hybrid drive device further includes a rotor support member that supports the rotor of the rotary electric machine and that is fixed to the second transmitting shaft through splines at a fixing portion (f), the rotor support member is fitted to the second transmitting shaft on the engine side of the shaft support portion of the case, and the fixing portion (f) of the rotor support member and the second transmitting shaft is at least partially overlapped with the second radial bearing in the axial direction when viewed in the radial direction.