To provide a wheel alignment measuring apparatus for enabling an automobile user to easily measure and diagnose wheel alignment.

A wheel alignment diagnosis apparatus is comprised of: three sensor units A mounted on two front wheels of the automobile, and a king-pin supporting an axle, respectively; and a measuring unit B mounted on an instrument panel of the automobile. The sensor unit A detects a direction to which the unit itself is facing, and transmits a direction data to the measuring unit B from a communication unit 3. The measuring unit B calculates an alignment value of the wheels of the vehicle based on the direction data. Misalignment from a proper value is displayed on a display unit 24 when the calculated value is within the allowable range, and an alarm display is carried out when it is out of the allowable range.