A device for sticking a cover glass to a sample of microscopic specimen applied to a slide glass with an enclosure agent, the slide glass having in one end side a describing portion formed on one side face, said device comprising: a storage container for immersing a basket into which a plurality of slide glasses have been inserted vertically, in a protection liquid, which is stored in the storage container and which protects samples of microscopic specimen applied on the slide glasses, so as to immerse the entire slide glasses therein; take-out means for holding a side face of the end side of a slide glass, taking out the slide glass from the protection liquid, and turning the slide glass parallel to the level of the protection liquid; a dispenser for dispensing an enclosure agent onto the sample on a slide glass which has been taken out from the protection liquid by the take-out means; a mounting unit for mounting a cover glass onto the enclosure agent, which has been dispensed by the dispenser; and a cage for containing the slide glass on which the cover glass has been stuck to cover the sample; and a conveying unit for conveying the slide glass from the take-out means to successively the dispenser, the mounting unit and the cage, characterized in that the device also comprises lifting/feeding means (36,37) for holding said basket in said storage container, lifting the basket to project one end side of the slide glasses inserted therein from the level of the protection liquid, and sequentially feeding the basket to bring successive slide glasses to a position of the take-out means and a detection sensor, wherein the device comprises a said detection sensor which is adapted for detecting the arrival of the one end side of a slide glass projecting from the projection liquid. a storage container for immersing a basket into which a plurality of slide glasses have been inserted vertically, in a protection liquid, which is stored in the storage container and which protects samples of microscopic specimen applied on the slide glasses, so as to immerse the entire slide glasses therein; take-out means for holding a side face of the end side of a slide glass, taking out the slide glass from the protection liquid, and turning the slide glass parallel to the level of the protection liquid; a dispenser for dispensing an enclosure agent onto the sample on a slide glass which has been taken out from the protection liquid by the take-out means; a mounting unit for mounting a cover glass onto the enclosure agent, which has been dispensed by the dispenser; and a cage for containing the slide glass on which the cover glass has been stuck to cover the sample; and a conveying unit for conveying the slide glass from the take-out means to successively the dispenser, the mounting unit and the cage, characterized in that the device also comprises lifting/feeding means (36,37) for holding said basket in said storage container, lifting the basket to project one end side of the slide glasses inserted therein from the level of the protection liquid, and sequentially feeding the basket to bring successive slide glasses to a position of the take-out means and a detection sensor, wherein the device comprises a said detection sensor which is adapted for detecting the arrival of the one end side of a slide glass projecting from the projection liquid.