An automatic analysis system, comprising: a plurality of analysis modules (200, 300) that analyze a sample by mixing the sample with a reagent; a conveying line that conveys a sample rack which holds a sample container that contains the sample; and a sample rack distribution module that includes a rotatable standby disk arranged at one end of the conveying line and formed with a plurality of holding units which hold the sample rack, and that supplies the sample rack to the analysis modules (200, 300), wherein each of the analysis modules (200, 300) includes: a sample dispensing mechanism (208, 308) that dispenses a sample held in the sample rack; and a dispensing line (209, 309) that draws and delivers the sample rack from the sample rack distribution module to a sample dispensing position by the sample dispensing mechanism (208, 308), the conveying line and the dispensing lines (209, 309) are arranged not to be parallel to each other, and a device layout of the analysis modules (200, 300) with the sample rack distribution module interposed therebetween is line-symmetric with respect to a straight line passing through a rotation center of the standby disk, characterized in that the dispensing lines (209, 309) are arranged such that at least one of lines extending in a conveying direction of the sample rack of the plurality of the dispensing lines (209, 309) does not pass through the holding units of the standby disk, but passes between two adjacent holding units. a plurality of analysis modules (200, 300) that analyze a sample by mixing the sample with a reagent; a conveying line that conveys a sample rack which holds a sample container that contains the sample; and a sample rack distribution module that includes a rotatable standby disk arranged at one end of the conveying line and formed with a plurality of holding units which hold the sample rack, and that supplies the sample rack to the analysis modules (200, 300), wherein each of the analysis modules (200, 300) includes: a sample dispensing mechanism (208, 308) that dispenses a sample held in the sample rack; and a dispensing line (209, 309) that draws and delivers the sample rack from the sample rack distribution module to a sample dispensing position by the sample dispensing mechanism (208, 308), a sample dispensing mechanism (208, 308) that dispenses a sample held in the sample rack; and a dispensing line (209, 309) that draws and delivers the sample rack from the sample rack distribution module to a sample dispensing position by the sample dispensing mechanism (208, 308), the conveying line and the dispensing lines (209, 309) are arranged not to be parallel to each other, and a device layout of the analysis modules (200, 300) with the sample rack distribution module interposed therebetween is line-symmetric with respect to a straight line passing through a rotation center of the standby disk, characterized in that the dispensing lines (209, 309) are arranged such that at least one of lines extending in a conveying direction of the sample rack of the plurality of the dispensing lines (209, 309) does not pass through the holding units of the standby disk, but passes between two adjacent holding units.