An ultrasonic diagnostic apparatus includes: a plurality of receiving elements that receive an ultrasonic wave, convert the ultrasonic wave into an electric signal, and output a receiving signal； a first detecting amplifier that detects noise and outputs a noise signal； a second detecting amplifier that amplifies the noise signal and outputs an amplified noise signal； a subtraction amplifier that receives the receiving signal and the amplified noise signal and subtracts the amplified noise signal from the receiving signal； and a plurality of circuit substrates that each include the second detecting amplifier and subtraction amplifier.
