A sample preprocessing and conveying system, comprising: conveyance lines (15, 16, 19, 20, 23, 24, 27) each for conveying a sample carrier constructed so that one sample container or a plurality of sample containers are mounted on the carrier; preprocessing units each arranged along one of the conveyance lines and including a dispensing machine for creating child samples from a parent sample, and a storage unit for holding samples on stand-by; buffers (18, 22, 26) each for accepting the sample carrier queued; a plurality of analyzing systems (100, 200, 300) each connected downstream with respect to one of the buffers; a conveyance management unit for managing and controlling the sample preprocessing and conveying system; and an apparatus management unit for conducting integrated management of information on adequacy for measurement, the information being a criterion for determining whether measurement of samples by each analyzing system is executable; wherein: the preprocessing units and the buffers (18, 22, 26) are interconnected by the conveyance lines (15, 16, 19, 20, 23, 24, 27); the apparatus management unit is adapted to monitor the status of each analyzing system (100, 200, 300), including whether the analyzing system is in operation or on maintenance and the retained number of samples and the usable consumables, and to transmit, based on information on adequacy for measurement relating to all of the analyzing systems, state profile information that indicates states of the analyzing systems to the conveyance management unit; and the conveyance management unit has a function to determine conveyance destinations of each of the samples in accordance with the state profile information based on the information on adequacy for measurement, wherein the conveyance management unit stops creation of child samples from a parent sample and makes the parent sample stand by in the storage unit upon finding that the analysis item for the child samples has become unavailable from the analyzing systems (100, 200, 300), and automatically extracts the parent sample from the storage unit, conveys it to the dispensing machine which restarts creating child samples, and conveys the child samples to an analyzing system where the analysis item has become available. conveyance lines (15, 16, 19, 20, 23, 24, 27) each for conveying a sample carrier constructed so that one sample container or a plurality of sample containers are mounted on the carrier; preprocessing units each arranged along one of the conveyance lines and including a dispensing machine for creating child samples from a parent sample, and a storage unit for holding samples on stand-by; buffers (18, 22, 26) each for accepting the sample carrier queued; a plurality of analyzing systems (100, 200, 300) each connected downstream with respect to one of the buffers; a conveyance management unit for managing and controlling the sample preprocessing and conveying system; and an apparatus management unit for conducting integrated management of information on adequacy for measurement, the information being a criterion for determining whether measurement of samples by each analyzing system is executable; the preprocessing units and the buffers (18, 22, 26) are interconnected by the conveyance lines (15, 16, 19, 20, 23, 24, 27); the apparatus management unit is adapted to monitor the status of each analyzing system (100, 200, 300), including whether the analyzing system is in operation or on maintenance and the retained number of samples and the usable consumables, and to transmit, based on information on adequacy for measurement relating to all of the analyzing systems, state profile information that indicates states of the analyzing systems to the conveyance management unit; and the conveyance management unit has a function to determine conveyance destinations of each of the samples in accordance with the state profile information based on the information on adequacy for measurement, wherein the conveyance management unit stops creation of child samples from a parent sample and makes the parent sample stand by in the storage unit upon finding that the analysis item for the child samples has become unavailable from the analyzing systems (100, 200, 300), and automatically extracts the parent sample from the storage unit, conveys it to the dispensing machine which restarts creating child samples, and conveys the child samples to an analyzing system where the analysis item has become available.