PURPOSE: To elevate the efficiency of distributing work, by arranging a detector section adapted to detect abnormal condition without stopping the action of a distributor during the operation thereof and a printer which records abnormal condition by the output signal from the detector section.

CONSTITUTION: A reflection type photointerrupter 42 as another detector section is mounted at the end rim of a base 16a of a table 16 and light from a light emitting element of the interrupter 42 causes a reaction on the surface of a test tube 20 moved to the sampling position so that the reflected light will hit a light receiving element of the reflection type photointerrupter 42. Then, an output signal is outputted from the reflection type photointerrupter 42 only when the test tube 20 exists to be inputted into a microcomputer 38 and the sample number is recorded on a recording paper of a printer 14 for other abnormal conditions in noway requiring the stoppage of the operation of the distributor, for example, the test tube 20 left on a test tube rack 18, not coming off it. Thus, an operator can learn the details of abnormality from the recording paper after the end of the distributing work and can continue the distributing work.