Disclosed is a sample analyzer including: a transport apparatus configured to transport a sample rack holding a sample container; and a measurement apparatus body configured to measure a sample in the sample container held in the sample rack transported by the transport apparatus, wherein the transport apparatus includes a light source holding unit configured to detachably hold a light source unit, and the measurement apparatus body includes a detection unit configured to detect, via an analysis specimen containing the sample, light emitted from the light source unit held in the light source holding unit.