The ultrasonic observation apparatus includes a first conversion unit that converts an ultrasonic signal that is a time domain signal received by the transmission / reception unit into a frequency domain signal, and a regression equation for the frequency domain signal converted by the first conversion unit An attenuation correction coefficient calculation unit that calculates an attenuation correction coefficient on the basis of a first order coefficient in a regression equation of two or more points having different reception depths, based on the attenuation correction coefficient calculated by the attenuation correction coefficient calculation unit A second conversion unit for converting the frequency domain signal subjected to attenuation correction processing to a second time domain signal a second time unit for converting the frequency domain signal subjected to the attenuation correction processing to a second time domain signal And an image data generation unit that generates ultrasound image data based on the domain signal.超音波観測装置は、送受信部が受信した時間ドメイン信号である超音波信号を周波数ドメイン信号に変換する第1の変換部と、第1の変換部が変換した周波数ドメイン信号に対する回帰式を算出する回帰分析部と、受信深度が異なる2点以上の回帰式における1次の係数に基づいて減衰補正係数を算出する減衰補正係数算出部と、減衰補正係数算出部が算出した減衰補正係数に基づいて周波数ドメイン信号の減衰補正処理を行う減衰補正処理部と、減衰補正処理部が減衰補正処理を行った周波数ドメイン信号を第2の時間ドメイン信号に変換する第2の変換部と、第2の時間ドメイン信号に基づいて超音波画像データを生成する画像データ生成部と、を備える。
