To convert the same measuring signal by plural A/D converters having different characteristics into digital data and to compensate properly an output timing of digital data, in outputting a measuring data collecting device.

The measuring data collecting device is equipped with a delay buffer circuit which delays an external output of digital data which is outputting by the second A/D converter when the difference of a sampling timing between a first A/D converter and a second A/D converter is expressed by Tfs×m+α, by Tfs time unit, and with a phase adjusting circuit which is outputting by shifting a phase of a sampling clock by the quantity corresponding to α time period.