A specimen analyzer (100, 200, 300) that is communicably connected to an examination information management device for managing examination information regarding examination of a specimen and that transmits a result of measurement of the specimen to the examination information management device, comprising: a measurement unit (2, 3) for measuring the specimen; a storage unit for storing a predetermined determination condition and a host query rule used to determine whether or not a remeasurement necessity determination by the examination information management device is neccessary; a control unit that is capable of executing query processing for making a query to the examination information management device about whether or not remeasurement of the specimen is necessary and determination processing for determining whether or not the measurement result matches the predetermined determination condition that is stored in advance in the storage unit, and which is for causing the measurement unit (2, 3) to execute remeasurement of the specimen and for transmitting a measurement result of the remeasurement to the examination information management device in a case where the measurement result matches the predetermined determination condition as a result of execution of the determination processing, and for causing the measurement unit to execute remeasurement of the specimen in a case of receiving, from the examination information management device, determination information indicating that remeasurement of the specimen is necessary as a result of execution of the query processing, and wherein the control unit executes the query processing in a case where the measurement result does not match the predetermined condition, and matches the host query rule. a measurement unit (2, 3) for measuring the specimen; a storage unit for storing a predetermined determination condition and a host query rule used to determine whether or not a remeasurement necessity determination by the examination information management device is neccessary; a control unit that is capable of executing query processing for making a query to the examination information management device about whether or not remeasurement of the specimen is necessary and determination processing for determining whether or not the measurement result matches the predetermined determination condition that is stored in advance in the storage unit, and which is for causing the measurement unit (2, 3) to execute remeasurement of the specimen and for transmitting a measurement result of the remeasurement to the examination information management device in a case where the measurement result matches the predetermined determination condition as a result of execution of the determination processing, and for causing the measurement unit to execute remeasurement of the specimen in a case of receiving, from the examination information management device, determination information indicating that remeasurement of the specimen is necessary as a result of execution of the query processing, and wherein the control unit executes the query processing in a case where the measurement result does not match the predetermined condition, and matches the host query rule.