An aircraft wheel support mechanism capable of reducing the impact to the tire at the time of landing and capable of reducing the impact to the tire at the time of the wheel colliding with an obstacle lying on the runway. The mechanism has a suspension mechanism for rotatably supporting a wheel by the lower end of a support member connected to the fuselage, the suspension mechanism having a crank shaft assembly. The crank shaft assembly is made up of a horizontal support shaft rotatably supported by the lower end of the support member, an axle for rotatably supporting the wheel, and an arm positioned at right angles with the horizontal support shaft and axle for connecting one end of the horizontal support shaft to one end of the axle.