To provide a non-circular gear assembling steering device capable of adjusting a phase and toe angle in a four-wheel car.

A steering force reaches a reduction gear 8 from an input shaft 8a, and reaches a wheel support member 2 through a non-circular gear at a turning shaft setting member side 7 and a non-circular gear at a wheel support member side 6 after deceleration thereof. Accordingly, a turning wheel 1 is turned around a turning shaft center 01. When the toe angle is adjusted after assembling the car body of the steering device, a rotating system including a steering wheel and a rotating phase of a decelerator input shaft 8a are adjusted and integrally connected. A deviance of the turning wheel support member 2 and the turning wheel 1 from a non-turning neutral position (deviance of the toe angle) accompanying rotation of a pair of the non-circular gears 6, 7 during phase adjustment is made zero by expansion of an expanding member 11 by rotation of a nut 12 through rotation in a correspondence direction of a turing shaft setting member 3.

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