PROBLEM TO BE SOLVED: To enable training for a biopsy to sample a small tissue such as a calcified tissue, and visually recognize the content of a sample easily from the outer side.SOLUTION: The phantom (10) includes a first member (12) simulating a living body, and a second member (16) simulating the calcified tissue in the living body, and contained in the first member (12). In this case, the first member (12) includes polysaccharides to which radial rays and light are transmittable. The second member (16) is a substance with a lower transmission factor to radial rays and light as compared to the first member (12), or a substance to which radial rays and light are not transmittable.COPYRIGHT: (C)2012,JPO&INPIT【課題】石灰化組織のような小さな組織を採取するバイオプシのトレーニングが可能になると共に、採取物の中身を外部から容易に視認することが可能となる。【解決手段】ファントム(10)は、生体を模擬した第1部材(12)と、生体内の石灰化組織を模擬し且つ第1部材(12)に内蔵される第2部材(16)とを有する。この場合、第1部材(12)は、放射線及び光を透過可能な多糖類を含み、第2部材(16)は、第1部材(12)と比較して放射線及び光に対する透過率が低い物質であるか、又は、放射線及び光に対して不透過な物質である。【選択図】図1