An ultrasound observation apparatus provided with: an ultrasound probe for converting an electric transmission driving wave to an ultrasonic transmission echo, transmitting said transmission echo to an object to be observed, receiving a reception echo reflected from the object being observed, and converting same to an electric reception signal; a storage unit for storing parameters, which give characteristics according to the type of ultrasound probe and are necessary for generating the transmission driving wave and correcting the received signal; a transmission driving wave-generating section for referencing the parameters stored in the storage unit and generating a transmission driving wave corresponding to the ultrasound probe type so that the frequency spectrum of the transmission echo in a specified frequency band is the same regardless of the ultrasound probe type; a received signal-correcting section for referencing the parameters stored in the storage unit and correcting the received signal according to the ultrasound probe type; and an image processing unit for generating image data using the received signal corrected by the received signal-correcting section.