An apparatus for automatic execution of different treatment operations in connection with staining of tissue specimens on microscope slides, wherein the apparatus comprises: - a loading station for microscope slides with tissue specimens; - a number of reagent stations for staining of the tissue specimens on supplied microscope slides; - a conveyor for transfer of microscope slides between the stations in accordance with a staining program; - an unloading station for treated microscope slides; and - a control unit for controlling the treatment operations in accordance with a data program, characterised in that the apparatus further comprises - a photo station with a digital camera mounted on a microscope for automatic photographing with a background light source taking enlarged pictures of the finished treated tissue specimens on supplied microscope slides, the camera is connected to the control unit of the apparatus and the control unit is arranged to store the picture of each individual tissue specimen and information which is located on the microscopic slide, - a station for application of cover glasses on the stained tissue specimens on the microscope slides; wherein - the photo station is arranged after the station for application of cover glasses on the stained tissue specimens on the microscope slides, wherein the applying station is arranged to receive successive carriers with a number of laying microscope slides located side by side, and wherein the camera and the microscope slides are arranged to carry out a mutual movement for location of the camera over successive microscope slides, wherein - the camera is mounted on a step by step movable unit arranged to be moved laterally in a y-direction only for positioning of the camera over successive parts of a microscope slide, and wherein - the apparatus comprises a transport belt for step by step movement in a x-direction of groups of microscope slides which are located side by side on the transport belt. - a loading station for microscope slides with tissue specimens; - a number of reagent stations for staining of the tissue specimens on supplied microscope slides; - a conveyor for transfer of microscope slides between the stations in accordance with a staining program; - an unloading station for treated microscope slides; and - a control unit for controlling the treatment operations in accordance with a data program, characterised in that the apparatus further comprises - a photo station with a digital camera mounted on a microscope for automatic photographing with a background light source taking enlarged pictures of the finished treated tissue specimens on supplied microscope slides, the camera is connected to the control unit of the apparatus and the control unit is arranged to store the picture of each individual tissue specimen and information which is located on the microscopic slide, - a station for application of cover glasses on the stained tissue specimens on the microscope slides; wherein - the photo station is arranged after the station for application of cover glasses on the stained tissue specimens on the microscope slides, wherein the applying station is arranged to receive successive carriers with a number of laying microscope slides located side by side, and wherein the camera and the microscope slides are arranged to carry out a mutual movement for location of the camera over successive microscope slides, wherein - the camera is mounted on a step by step movable unit arranged to be moved laterally in a y-direction only for positioning of the camera over successive parts of a microscope slide, and wherein - the apparatus comprises a transport belt for step by step movement in a x-direction of groups of microscope slides which are located side by side on the transport belt.