A nucleic acid analysis apparatus comprising: a plurality of temperature adjustment apparatuses (20A-20H) disposed along a circumferential direction; a rotating mechanism that rotates a reaction plate assembly (10A-10H) disposed on the temperature adjustment apparatuses (20A-20H) along the circumferential direction; a delivery base and an ejection base which are installed on an outer peripheral side of the temperature adjustment apparatuses (20A-20H); a delivery drive mechanism that delivers the reaction plate assembly (10A-10H) from the delivery base onto the temperature adjustment apparatuses (20A-20H); an ejection drive mechanism that ejects the reaction plate assembly (10A-10H) from the temperature adjustment apparatuses (20A-20H) to the ejection base; a detection apparatus that optically detects a sample loaded on the reaction plate assembly (10A-10H), wherein the rotating mechanism includes a rotating shaft and a plurality of pressing portions (31A-31H) that rotate around the rotating shaft; the reaction plate assembly (10A-10H) is configured to be moved over the temperature adjustment apparatuses (20A-20H) along the circumferential direction in a state of being pressed onto the temperature adjustment apparatuses (20A-20H) by the pressing portions (31A-31H); the delivery drive mechanism causes the reaction plate assembly (10A-10H) disposed on the delivery base to be moved radially inward and delivered between the pressing portions (31A-31H) and the temperature adjustment apparatuses (20A-20H); and the ejection drive mechanism is configured to cause the reaction plate assembly (10A-10H) disposed over the temperature adjustment apparatuses (20A-20H) to be moved radially outward and ejected from between the pressing portions (31A-31H) and the temperature adjustment apparatuses (20A-20H) onto the ejection base. a plurality of temperature adjustment apparatuses (20A-20H) disposed along a circumferential direction; a rotating mechanism that rotates a reaction plate assembly (10A-10H) disposed on the temperature adjustment apparatuses (20A-20H) along the circumferential direction; a delivery base and an ejection base which are installed on an outer peripheral side of the temperature adjustment apparatuses (20A-20H); a delivery drive mechanism that delivers the reaction plate assembly (10A-10H) from the delivery base onto the temperature adjustment apparatuses (20A-20H); an ejection drive mechanism that ejects the reaction plate assembly (10A-10H) from the temperature adjustment apparatuses (20A-20H) to the ejection base; a detection apparatus that optically detects a sample loaded on the reaction plate assembly (10A-10H), wherein the rotating mechanism includes a rotating shaft and a plurality of pressing portions (31A-31H) that rotate around the rotating shaft; the reaction plate assembly (10A-10H) is configured to be moved over the temperature adjustment apparatuses (20A-20H) along the circumferential direction in a state of being pressed onto the temperature adjustment apparatuses (20A-20H) by the pressing portions (31A-31H); the delivery drive mechanism causes the reaction plate assembly (10A-10H) disposed on the delivery base to be moved radially inward and delivered between the pressing portions (31A-31H) and the temperature adjustment apparatuses (20A-20H); and the ejection drive mechanism is configured to cause the reaction plate assembly (10A-10H) disposed over the temperature adjustment apparatuses (20A-20H) to be moved radially outward and ejected from between the pressing portions (31A-31H) and the temperature adjustment apparatuses (20A-20H) onto the ejection base.