A sample analyzer comprising: a measurement unit for measuring a sample contained in a sample container; a barcode reader; a rotating section; and a controller is disclosed. The controller controls the rotating section and the barcode reader so that the barcode reader repeatedly reads the barcode over the range of a predetermined rotation angle; and obtains identification information of the sample contained in the sample container on the basis of reading results obtained as a result of the repeated reading of the barcode by the barcode reader. Method of obtaining sample identification information and a sample identification information obtaining apparatus are also disclosed.