System for marking a non-human biological object and removing a sample of the biological object, which object is in particular an animal, the system comprising: - a first tag part, - a second tag part, - a pin, having a first end and a second end, which pin is connected to the first tag part by its first end and which pin is provided with a head at its second end, - a sample removing stopper which - while attaching the tag parts on the biological object and removing the sample therefrom - is positioned on the head of the pin, wherein the stopper has an annular, preferably circular, cutter at its front, preferably with a cutting ring made of metal, which cutter delimits a sample receiving cavity which is open at the front, wherein the second tag part is provided with a passage for the stopper and the head of the pin, - a sample container with an introduction opening for introducing into the sample container the stopper and the sample of the object that has been cut by the cutter, which sample container is attached to the second tag part via a releasable connection, in such a manner that the introduction opening of the sample container and the passage of the second tag part lie in line, the system - in use - allowing the pin to be pressed through a part of the biological object, in particular through the ear of an animal, thereby cutting with the cutter a sample from the object, said sample being at least partly received in the sample receiving cavity, and the stopper and the head passing through the passage of the second tag part, as a result of which the first and second tag parts are attached to one another and to the biological object via the pin, the stopper and the sample being introduced into the sample container, said stopper sealing the introduction opening of the sample container, characterized in that the second tag part is provided in the region of the passage of the second tag part with a sample fixating spike member having a spike directed away from the sample container, the sample fixating spike member being secured in an initial position thereof to the second tag part such that when the cutter is pressed onto one side of the object the spike is directed towards the sample receiving cavity of the stopper and engages on the opposite side of the sample to be removed from the object thereby fixating said sample to be removed, and the sample fixating spike member being movable away from said initial position into the sample container under the load of the sample when the cutter is pressed onto the opposite side of the object. - a first tag part, - a second tag part, - a pin, having a first end and a second end, which pin is connected to the first tag part by its first end and which pin is provided with a head at its second end, - a sample removing stopper which - while attaching the tag parts on the biological object and removing the sample therefrom - is positioned on the head of the pin, wherein the stopper has an annular, preferably circular, cutter at its front, preferably with a cutting ring made of metal, which cutter delimits a sample receiving cavity which is open at the front, wherein the second tag part is provided with a passage for the stopper and the head of the pin, - a sample container with an introduction opening for introducing into the sample container the stopper and the sample of the object that has been cut by the cutter, which sample container is attached to the second tag part via a releasable connection, in such a manner that the introduction opening of the sample container and the passage of the second tag part lie in line, the system - in use - allowing the pin to be pressed through a part of the biological object, in particular through the ear of an animal, thereby cutting with the cutter a sample from the object, said sample being at least partly received in the sample receiving cavity, and the stopper and the head passing through the passage of the second tag part, as a result of which the first and second tag parts are attached to one another and to the biological object via the pin, the stopper and the sample being introduced into the sample container, said stopper sealing the introduction opening of the sample container, characterized in that the second tag part is provided in the region of the passage of the second tag part with a sample fixating spike member having a spike directed away from the sample container, the sample fixating spike member being secured in an initial position thereof to the second tag part such that when the cutter is pressed onto one side of the object the spike is directed towards the sample receiving cavity of the stopper and engages on the opposite side of the sample to be removed from the object thereby fixating said sample to be removed, and the sample fixating spike member being movable away from said initial position into the sample container under the load of the sample when the cutter is pressed onto the opposite side of the object.