Abstract: A semen collection sheet has a front surface to which semen attaches and a back surface having a fixing portion, and when the sheet is unfolded, a reservoir portion is formed to accumulate semen that attaches to the front surface. In a clinic, at home, or other appropriate environment, a user unfolds the semen collection sheet and fixes the sheet to a mounting surface such that the reservoir portion is positioned vertically downward. A user ejaculates aiming at a target portion. Ejaculate semen attaches to the front surface and runs down along the front surface under gravity, and accumulates in the reservoir portion.