A biological information displaying apparatus includes: a measuring section which is configured to measure a biological information waveform containing a specific measurement value； a calculating section which is configured to calculate the specific measurement value based on the biological information waveform that is measured by the measuring section in a designated unit time； a determining section which is configured to determine a level of a reliability of the specific measurement value that is calculated by the calculating section, based on the biological information waveform that is measured by the measuring section in the unit time； and a displaying section which is configured to display a trend graph of the specific measurement values while the specific measurement values are distinct according to the level of the reliability that is determined by the determining section.
