An ultrasonic observation apparatus includes: a first conversion unit configured to convert an ultrasonic signal, which is a time domain signal, received by a transmitting and receiving unit, into a frequency domain signal a regression analysis unit configured to calculate a regression expression for the frequency domain signal converted by the first conversion unit an attenuation correction coefficient calculation unit configured to calculate an attenuation correction coefficient based on first-order coefficients in the regression expressions at two points or more having different reception depths an attenuation correction processing unit configured to perform attenuation correction processing on the frequency domain signal based on the attenuation correction coefficient calculated by the attenuation correction coefficient calculation unit a second conversion unit configured to convert the frequency domain signal, on which the attenuation correction processing has been performed by the attenuation correction processing unit, into a second time domain signal and an image data generation unit configured to generate ultrasonic image data based on the second time domain signal.
