An ultrasound observation apparatus according to the present invention is an ultrasound observation apparatus for generating an ultrasound image based on an echo signal obtained by converting an ultrasound echo being an ultrasound wave transmitted onto an observation target and reflected by the observation target, into an electrical signal, and the ultrasound observation apparatus includes a first ultrasound processing unit configured to control transmission and reception processing of an ultrasound wave to the observation target, and generate first image data based on an echo signal obtained by the transmission and reception processing, a second ultrasound processing unit configured to control transmission and reception processing of an ultrasound wave at a timing different from that of transmission and reception processing performed by the first ultrasound processing unit, and using a scanning method having a frame rate shorter than a frame rate of the first ultrasound processing unit, and generate second image data based on an obtained echo signal, and an image synthesis processing unit configured to synthesize the first image data and the second image data.
