To provide a four-wheel drive vehicle to support a rear wheel in a swinging form and capable of arranging a power unit compact by using a vacant space and maintaining a power transmitting efficiency to the rear wheel high.

The power unit 42 made of an engine 40, a transmission 41, etc. and a rear wheel shaft 37 are, for example, mounted on a swing frame 37 and are made free to vertically oscillate against a car body frame 1. The power unit 42 free to oscillate and a speed reduction case 12 for driving a front wheel of a vehicle front part are connected to each other free to transmit power by a propeller shaft 62 for driving the front wheel. Favorably, an intermediate part of the propeller shaft 62 for driving the front wheel is supported in a bearing case 70 provided in a cross pipe 5, a universal joint 69 is provided, and a center of the universal joint 69 is matched with an oscillating shaft center of the swing frame 36 in vertical directional position and height.