A first trocar 20 as an medical apparatus includes an insertion hole 22a having a projection opening for leading out a biopsy forceps 40 into a body of a subject, a lid body 24 for blocking the projection opening of the insertion hole 22a, and a cooling sheet 23 for cryogenically cooling a biopsy portion 41 arranged in the vicinity of the lid body 24 in a state where the biopsy forceps 40 is stored in the insertion hole 22a, and is capable of easily harvesting a living tissue while retaining morphological change of tissues in a living body under various hemodynamics.
