The invention relates to a system for collecting at least one sample of animal tissue, including: a sampling device, including at least one cutting element for cutting off a sample of animal tissue, and a storage device including a receiving tube for receiving said sample. According to the invention, the system includes a weighted element (22) configured so as to assume at least two positions, i.e. a first position which is assumed prior to collecting said sample and in which said weighted element (22) is retained in said sampling device or in said storage device, and a second position which is assumed after said sample is collect and in which said weighted element (22) is free within said tube, said weighted element (22) being pushed inside said tube during said sampling.
