To realize a vehicle driving apparatus with which an engagement device can be set in a partial engagement state easily and a responsiveness of the engagement device can be maintained at a favorable level, a vehicle driving apparatus in which a rotating electrical machine MG and an engagement device C1 are disposed on a power transmission path linking an input member I drive - coupled to an internal combustion engine E and an output member drive - coupled to a vehicle wheel is provided. The engagement device C1 includes an engagement input side member 31 coupled to the input member, an engagement output side member 32 that forms a pair with the engagement input side member 31 and is coupled to the rotating electrical machine MG5 a friction member 33 disposed between the engagement input side member 31 and the engagement output side member 32, and a pressing member 34 for pressing the friction member 33 in a pressing direction A2. A working oil pressure chamber H1 is formed between the engagement output side member 32 and the pressing member 34, and a biasing spring 35 for biasing the pressing member 34 in the pressing direction A2 when no working oil pressure is supplied to the working oil pressure chamber H1 is disposed on the exterior of the working oil pressure chamber H1.