Abstract: An apparatus for automatic execution of different treatment operations in connection with staining of tissue specimens on microscope slides, wherein the apparatus (1) comprises a loading station (2) for microscope slides (7) with tissue specimens, a number of reagent stations (3) for staining of the tissue specimens on supp Ned microscope slides, a conveyor (5) for transfer of microscope slides (7) between the stations (3) in accordance with a staining program, an unloading station (10) for treated microscope slides, and a control unit (19) for controlling the treatment operations in accordance with a data program, The apparatus comprise a photo station (25) with a digital camera (26) for automatic photographing with a background light source of the finished treated tissue specimens on supplied microscope slides (7).