Provided are diagnosis assistance apparatus, diagnosis assistance method, and diagnosis assistance program, according to which it is possible to effectively assist diagnosis by making it easy to understand a state of biological information of a measurement subject. A diagnosis assistance apparatus includes: biological information analysis unit configured to analyze a plurality of pieces of biological information that are measured from a measurement subject and are stored along with measurement times in a storage medium, and calculate an occurrence frequency of a fluctuating state in which the biological information fluctuates by a threshold or more in a predetermined period and representative value for fluctuation amount of the biological information in the fluctuating state that occurs in the predetermined period; and an analysis result output unit configured to output a graph indicating an analysis result obtained by associating occurrence frequency and representative value that were calculated by the biological information analysis unit.