A medical diagnostic apparatus acquires a signal to generate images of an observation target, sequentially generates observation images based on the acquired signal, and causes a display to continuously display the observation images. The apparatus includes: a first storage for storing the observation images in chronological order； input units for receiving a command signal for freezing the observation images on the display； and a second storage for storing correction information for each input unit so as to associate the correction information with each input unit. The apparatus is configured to: identify an input unit that has received the command signal among the input units； determine a correction amount based on a result of identification by the identification unit and the correction information； and select an observation image generated before or after receiving the command signal according to the correction amount, from among the observation images, based on the correction amount.
