PROBLEM TO BE SOLVED: To provide a supporting body, a body fluid collection unit, and a method for collecting body fluid by which not only health professionals including doctors but also persons who are not health professionals can easily support the body fluid collection sheet.SOLUTION: A supporting body 1 includes: a first sheet 10 having an adhesive surface 12 for making a body fluid collection sheet 30 adhere to the surface； and a second sheet 20 adhering to the first sheet 10. The adhesive surface 12 of the first sheet 10 is attached to the body fluid collection sheet 30, the first sheet 10 is separated from a skin 40, and the body fluid collection sheet 30 is removed from the skin 40. After that, the second sheet 20 is put on the adhesive face 12 and the body fluid collection sheet 30 is supported by the supporting body 1.SELECTED DRAWING: Figure 1【課題】医師等の医療従事者でなくとも体液収集シートを容易に支持させることが可能な支持体、体液収集セットおよび体液収集方法を提供する。【解決手段】支持体１は、体液収集シート３０を粘着するための粘着面１２を有する第１シート１０と、第１シート１０に粘着される第２シート２０と、を備える。第１シート１０の粘着面１２を体液収集シート３０に貼り付けて、第１シート１０を皮膚４０から離間させ、皮膚４０から体液収集シート３０を引き剥がす。その後、第２シート２０を粘着面１２に重ねて、体液収集体シート３０を支持体１に支持させる。【選択図】図１
