MEASUREMENT DEVICE

Provided is a measurement device for measuring the incline angle of a measurement surface with respect to a measurement reference plane. This measurement device comprises: a rotation mechanism; a support member capable of being rotated about a support member axis by the rotation mechanism; an angle detector for detecting the rotation angle of the support member; and an incline detector for detecting the incline angle of the support member with respect to a measurement reference plane, the incline detector being disposed on the support member. The measurement device is placed on a measurement surface. The rotation mechanism causes the support member to rotate such that the incline detector is substantially parallel to the measurement reference plane. The measurement device measures the incline angle of the measurement surface with respect to the measurement reference plane on the basis of the rotation angle of the rotation of the support member detected by the angle detector, and the incline angle detected by the incline detector.