To provide a measuring device which can measure the height of a measurement section in a mounting component rapidly with a high degree of accuracy.

A distance sensor 12 is moved in the direction which is parallel to a substrate surface 31 and along predetermined scanning lines (L1-L3) by an orthogonal robot. A measurement signal is outputted to the distance sensor 12 by a control circuit, whenever the distance sensor 12 moves for a predetermined distance, on the basis of the movement amount of the distance sensor 12 which is measured by an encoder. When a formation waveform is generated in which the height from the substrate surface 31 which is obtained from relative distance measured by the distance sensor 12 is determined as a vertical axis and a scanning position is determined as a horizontal axis, the measurement height of a press face 45a of each of connector pins 42a-42c is calculated from the height from the substrate surface 31 corresponding to the scanning position of the press face 45a, on the basis of the formation waveform.