In order to reduce variation in reception gain between channels in a multi-channel transducer probe, a transducer, a transmission circuit for transmitting a signal for driving the transducer with ultrasonic waves, and a signal transmitted from the transmission circuit A wiring for transmitting a signal from an ultrasonically driven oscillator, a receiving circuit connected to the wiring to receive a signal from the oscillator, and a capacitance of the line including the wiring from the oscillator to the receiving circuit are corrected The ultrasonic probe is composed of a plurality of channels in combination with the capacitance correcting circuit for one channel and the capacity of the line including the wiring from the vibrator to the receiving circuit is measured for each channel, The capacity correction circuit is adjusted for each channel so that the measured capacitance of the channel becomes the same.多チャンネル振動子の探触子において、チャンネル間の受信利得ばらつきを低減するために、振動子と、振動子を超音波で駆動する信号を伝送する伝送回路と、伝送回路から伝送された信号で超音波で駆動された振動子からの信号を伝送する配線と、配線と接続して振動子からの信号を受信する受信回路と、振動子から受信回路までの配線を含む線路の容量を補正する容量補正回路との組合せを1チャンネル分として、複数チャンネル分を備えて超音波探触子を構成し、各チャンネルごとに振動子から受信回路までの配線を含む線路の容量を測定し、全てのチャンネルの測定した容量が同じになるように各チャンネルごとに容量補正回路を調整するようにした。
