A wireless measuring device 1 is provided which includes a plurality of child units 2 and a parent unit 3 to receive data measured by these child units 2 by wireless communication. Each of the child units 2 has a controlling section 20 that can move to a standby state, a measuring section 21, a signal receiving section 22 to receive a measurement instructing signal from the parent unit 3, and a signal transmitting section 23 to transmit the measured data by wireless communication. The parent unit 3 has a signal transmitting section to transmit the measurement instructing signal to each of the child units 2 and a measured data receiving section 32 to receive measured data to be transmitted from the signal transmitting section 23.