A cardiopulmonary resuscitation monitoring apparatus includes: a light source section configured to cause light, which includes at least infrared light, to be incident on a living body a light receiving unit configured to receive at least one of transmitted light that is transmitted through the living body and reflected light that is reflected from the living body a calculating unit, configured to calculate a ratio of the DC components of the received light intensities of the received light during execution of cardiopulmonary resuscitation and reference DC components of received light an evaluating unit configured to perform evaluation related to the cardiopulmonary resuscitation based on the ratio calculated by the calculating unit and an outputting unit configured to perform an output in accordance with a result of the evaluation performed by the evaluating unit.
