The present invention relates to a centrifugal separator including a rotor (51) which is to be rotated to apply a centrifugal force to a container (9) and which includes a detection target portion (57) utilized for detecting a particular portion of the rotor (51), and also relates to an analytical apparatus provided with the centrifugal separator. The detection target portion (57) is so designed as to cause outputting of at least three kinds of signals which are distinguishable from each other. For instance, the detection target portion (57) includes a first detection target region (57A) having a higher reflectivity than a surface of the rotor (51), and a second detection target region (57b) which reflects light in a manner different from the surface of the rotor and the first detection target region (57A). For instance, the second detection target region (57b) includes a plurality of linear portions (57Ba) regularly spaced from each other.